[
 {
  "number": 1,
  "title": "Belt and Pulleys",
  "status": "done",
  "physically_driven": true,
  "mechanism": "belt (friction; 120-link elastic chain)",
  "measured": "pass: ω_bot/ω_top 0.994 (0.6% creep), belt on, μ≈0 control 0.000",
  "notes": "Only the upper pulley is motor-driven (30 rpm).",
  "page": "https://507simulations.com/movement/001/"
 },
 {
  "number": 2,
  "title": "Pulleys and Crossed Belt",
  "status": "done",
  "physically_driven": true,
  "mechanism": "crossed round belt (friction; 120-link cord, strands collide at the cross)",
  "measured": "pass: ω_bot/ω_top −0.990 (1.0% creep), belt on, belt-belt contact 100% of samples, ≤1.0 mm",
  "notes": "Only the upper pulley is motor-driven. Frictionless cord-on-cord contact; flat half-twisted variant still open.",
  "page": "https://507simulations.com/movement/002/"
 },
 {
  "number": 3,
  "title": "Pulleys with Right Angle Guides",
  "status": "done",
  "physically_driven": true,
  "mechanism": "round cord (friction; 145-link elastic chain, 20 N) laid on the common tangents in space: driver on a y shaft, two loose guide pulleys side by side (one per leaf), drum on an x shaft at right angles",
  "measured": "pass: ω_drum/ω_drive −1.755 (geometry −1.755), front guide +2.135, back guide −2.128 (geometry ±2.114; the guides turn opposite ways); steady over a 20 s soak; cord within 0.6 cm of its centre line, pen ≤1.8 mm; μ≈0 control 0.000",
  "notes": "Only the driving pulley is motor-driven. Leaves reach the driver's single groove at a ~7.5° fleet angle; at ~9° the cord walks over the flange, so the driver stands 40 cm off.",
  "page": "https://507simulations.com/movement/003/"
 },
 {
  "number": 4,
  "title": "Pulleys with Right Angle Transition",
  "status": "done",
  "physically_driven": true,
  "mechanism": "crossed round cord (friction; 150-link elastic chain, 20 N) from the driver down to two guide pulleys on studs square to their runs, a full helical turn round an upright drum whose shaft meets the driver's at right angles; crossing leaves rub",
  "measured": "pass: ω_drum/ω_top +1.607 (geometry 1.603), guides −1.785/−1.772 (geometry −1.755); steady over an 8 s soak; leaves touch at the cross, ≤0.19 mm; μ≈0 control 0.000",
  "notes": "Only the driving pulley is motor-driven. Drum face is smooth (Brown's spiral groove not cut): the turn settles down it, cord ≤2.2 cm off its nominal helix; leaves press the driver's flange edges (pen ≤3.0 mm). Cord sub-chains carry a whisker of root damping so straight runs cannot spin about their own axis.",
  "page": "https://507simulations.com/movement/004/"
 },
 {
  "number": 5,
  "title": "Pulleys with Tightening Mechanism",
  "status": "done",
  "physically_driven": true,
  "mechanism": "belt (friction; 100-link elastic chain, 4 N) + tightening pulley B on a sprung handle, wrapping the back of the slack side",
  "measured": "pass: B in → ω_bot/ω_top 1.425 (0.1% creep); B withdrawn at 4 s → 0.001 (top pulley still at speed); B in again at 8 s → 1.410; withdrawn from start → |ω_bot| 0.002 rad/s; μ≈0 control 0.000; pen ≤1.25 mm",
  "notes": "Only the top pulley is motor-driven. The operator's hand moves only B's spring (`hand:` schedule), shown in the render.",
  "page": "https://507simulations.com/movement/005/"
 },
 {
  "number": 6,
  "title": "Pulleys with Vibrating Lever",
  "status": "done",
  "physically_driven": true,
  "mechanism": "open cord band riveted to the rocking segment at both ends (friction on the pulleys; 110 links, 15 N), crossing leaves rub past each other",
  "measured": "pass: lever rocked ±0.45 rad at 0.5 Hz → each pulley follows with slope −2.150 (geometry −2.114; cord sits ~1 mm into the rims), r² 1.000, both in step; leaves touch at the cross 100% of samples, ≤0.38 mm; pen ≤1.0 mm; μ≈0 control → slope −0.003",
  "notes": "Only the lever is driven (the hand: a velocity target rocking it to and fro).",
  "page": "https://507simulations.com/movement/006/"
 },
 {
  "number": 7,
  "title": "Pulley Transmission",
  "status": "done",
  "physically_driven": true,
  "mechanism": "belt (friction; 40-link steel band, 40 N) + 3 straight bevels (per-tooth convex hulls) on concentric shafts a/b, loose middle pulley",
  "measured": "pass: band on b → ω_up/ω_drum −1.306, band on a → +1.297 (reversed), band on loose pulley → 0.000; μ≈0 control 0.000; teeth out of contact → upright 0.000; belt dev 0.17, pen 0.37 mm",
  "notes": "Only the drum is motor-driven. Belt position is a passive variant (all three tested); the render shows it on b's pulley so it runs.",
  "page": "https://507simulations.com/movement/007/"
 },
 {
  "number": 8,
  "title": "Variable Speed Stepped Pulleys",
  "status": "done",
  "physically_driven": true,
  "mechanism": "belt (friction; 64-link steel band, 40 N) on 2 four-step cones in opposite order, band position = variant",
  "measured": "pass: band on each of the 4 step pairs → ω_driv/ω_driver 2.376 / 1.340 / 0.731 / 0.404 against 2.455 / 1.361 / 0.735 / 0.407 (0.5–3.2% creep), belt dev 0.13, lateral 0.00, pen ≤1.3 mm; μ≈0 control 0.0000",
  "notes": "Only the top cone is motor-driven. The four band positions are passive variants (all four tested); the render shows the second one, as drawn. Steps are drawn 4.4 wide but only the band's 1.2 collides.",
  "page": "https://507simulations.com/movement/008/"
 },
 {
  "number": 9,
  "title": "Variable Speed Cone Pulleys",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 10,
  "title": "Variable Speed Nonlinear Cone Pulleys",
  "status": "done",
  "physically_driven": true,
  "mechanism": "band (friction; 120-link flat band on curved cones, collided as stacks of frustum hulls; no fork, as in the plate)",
  "measured": "pass: band wide 1.169 (radii 1.132; pitch-line radius r+t/2 gives the excess), plate 0.628 (0.599), narrow 0.392 (0.393), 3.0:1 over the traverse; belt dev 0.58, lateral 1.70; μ≈0 control 0.000 / 0.002 / −0.003",
  "notes": "Only the upper pulley is motor-driven. The band position is a passive variant (all three tested, `test_010_variants_vary_the_speed_nonlinearly`).",
  "page": "https://507simulations.com/movement/010/"
 },
 {
  "number": 11,
  "title": "Right Angle Belt Transition",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 12,
  "title": "Simple pulley used for lifting weights",
  "status": "done",
  "physically_driven": true,
  "mechanism": "rope (friction on the sheave; 34-link hemp chain, its eyes pinned to the hand and the bag)",
  "measured": "pass: bag/hand 1.012 (no advantage in a fixed pulley), sheave turned by the rope at 10.66 of 10.64 rad/s per cm/s, pull 189.9 N against the weight's 191 N, pen ≤ 0.06 mm",
  "notes": "Only the hand is driven (a slide joint in a guide along the rope, 6 cm/s). Negative control: the rope's contact with the sheave off → the bag does not rise (0.000).",
  "page": "https://507simulations.com/movement/012/"
 },
 {
  "number": 13,
  "title": "In this the lower pulley is movable",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 14,
  "title": "Blocks and tackle",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 15,
  "title": "White’s pulleys, which can either be made with separate loose…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 16,
  "title": "Spanish bartons",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 16–17",
  "page": null
 },
 {
  "number": 17,
  "title": "Spanish bartons",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 16–17",
  "page": null
 },
 {
  "number": 18,
  "title": "A combination of two fixed pulleys and one movable pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 19,
  "title": "Different arrangements of pulleys",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 19–22",
  "page": null
 },
 {
  "number": 20,
  "title": "Different arrangements of pulleys",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 19–22",
  "page": null
 },
 {
  "number": 21,
  "title": "Different arrangements of pulleys",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 19–22",
  "page": null
 },
 {
  "number": 22,
  "title": "Different arrangements of pulleys",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 19–22",
  "page": null
 },
 {
  "number": 23,
  "title": "A contrivance for transmitting rotary motion to a movable pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 24,
  "title": "Spur-gears",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 25,
  "title": "Bevel-gears",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 26,
  "title": "The wheel to the right is termed a “crown-wheel;” that gearing…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 27,
  "title": "“Multiple gearing”—a recent invention",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 28,
  "title": "These are sometimes called “brush-wheels.” The relative speeds can…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 29,
  "title": "Transmission of rotary motion from one shaft at right angles to…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 30,
  "title": "Rectangular gears",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 31,
  "title": "Worm or endless screw and a worm-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 32,
  "title": "Friction-wheels",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 33,
  "title": "Elliptical spur-gears",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 34,
  "title": "An internally toothed spur-gear and pinion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 35,
  "title": "Variable rotary motion produced by uniform rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 36,
  "title": "Mangle-wheel and pinion—so called from their application to…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 37,
  "title": "Uniform into variable rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 38,
  "title": "A means of converting rotary motion, by which the speed is made…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 39,
  "title": "Sun-and-planet motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 40,
  "title": "Rotary converted into rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 40–41",
  "page": null
 },
 {
  "number": 41,
  "title": "Rotary converted into rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 40–41",
  "page": null
 },
 {
  "number": 42,
  "title": "Different kinds of gears for transmitting rotary motion from one…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 42–43",
  "page": null
 },
 {
  "number": 43,
  "title": "Different kinds of gears for transmitting rotary motion from one…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 42–43",
  "page": null
 },
 {
  "number": 44,
  "title": "A kind of gearing used to transmit great force and give a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 45,
  "title": "Frictional grooved gearing—a comparatively recent invention",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 46,
  "title": "Fusee chain and spring-box, being the prime mover in some watches,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 47,
  "title": "A frictional clutch-box, thrown in and out of gear by the lever at…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 48,
  "title": "Clutch-box",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 49,
  "title": "Alternate circular motion of the horizontal shaft produces a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 50,
  "title": "Two kinds of universal joints",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 50–51",
  "page": null
 },
 {
  "number": 51,
  "title": "Two kinds of universal joints",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 50–51",
  "page": null
 },
 {
  "number": 52,
  "title": "Another kind of clutch-box",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 53,
  "title": "The vertical shaft is made to drive the horizontal one in either…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 54,
  "title": "Mangle or star-wheel, for producing an alternating rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 55,
  "title": "Different velocity given to two gears, A and C, on the same shaft,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 56,
  "title": "Used for throwing in and out of gear the speed-motion on lathes",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 57,
  "title": "The small pulley at the top being the driver, the large,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 58,
  "title": "For transmitting three different speeds by gearing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 59,
  "title": "For transmitting two speeds by gearing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 60,
  "title": "For transmitting two speeds by means of belts",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 61,
  "title": "For transmitting two speeds, one a differential motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 62,
  "title": "For transmitting two speeds, one of which is a different and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 63,
  "title": "Jumping or intermittent rotary motion, used for meters and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 64,
  "title": "Another arrangement of jumping motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 65,
  "title": "The left-hand disk or wheel, C, is the driving-wheel, upon which…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 66,
  "title": "A modification of 64; a weight, D, attached to an arm secured in…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 67,
  "title": "Another modification of 64; a weight or tumbler, E, secured on the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 68,
  "title": "The single tooth, A, of the driving-wheel, B, acts in the notches…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 69,
  "title": "B, a small wheel with one tooth, is the driver, and the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 70,
  "title": "The driving-wheel, C, has a rim, shown in dotted outline, the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 71,
  "title": "The inner circumference (shown by dotted lines) of the rim of the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 72,
  "title": "A tilt-hammer motion, the revolution of the cam or wiper-wheel, B,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 73,
  "title": "To the driving-wheel, D, is secured a bent spring, B; another…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 74,
  "title": "A uniform intermittent rotary motion in opposite directions is…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 75,
  "title": "Reciprocating rectilinear motion of the rod, C, transmits an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 76,
  "title": "Another contrivance for registering or counting revolutions",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 77,
  "title": "The vibration of the lever, C, on the center or fulcrum, A,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 78,
  "title": "A modification of 77.",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 79,
  "title": "Reciprocating rectilinear motion of the rod, B, produces a nearly…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 80,
  "title": "Rectilinear motion is imparted to the slotted bar, A, by the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 81,
  "title": "Alternate rectilinear motion is given to the rack-rod, B, by the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 82,
  "title": "Double Treadle Ratchet",
  "status": "done",
  "physically_driven": true,
  "mechanism": "ratchet (contact only: two sprung pawls on arms B loose on A's shaft against 30 hooked teeth; links to two treadles pinned to them; strap over C as a tension-only tendon; two feet, each press-only, alternately)",
  "measured": "pass: A turns one way at a mean 1.09 rad/s (10.4 rev/min), never below 0.27× the mean, largest run-back 0.000 rad; pawls click over the teeth 5–6 times a second each (83% / 63% on their arm's return stroke, the rest when A runs ahead); back treadle follows the front at slope −1.000 (r² 0.99) through the strap; penetration 0.28 mm",
  "notes": "Inputs are the two feet (0.5 N·m half-sine, 60 strokes/min each); load on A 0.06 N·m·s/rad. C is a fixed round: the strap slides over it frictionlessly, so C does not turn.",
  "page": "https://507simulations.com/movement/082/"
 },
 {
  "number": 83,
  "title": "A nearly continuous rotary motion is given to the wheel, D, by two…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 84,
  "title": "The double rack-frame, B, is suspended from the rod, A. Continuous…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 85,
  "title": "Intermittent alternating rectilinear motion is given to the rod,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 86,
  "title": "A method of working a reciprocating pump by rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 87,
  "title": "A contrivance for a self-reversing motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 88,
  "title": "Continuous rotary converted into intermittent rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 89,
  "title": "An eccentric generally used on the crank-shaft for communicating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 90,
  "title": "A modification of the above",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 91,
  "title": "Triangular eccentric, giving an intermittent reciprocating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 92,
  "title": "Ordinary crank motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 93,
  "title": "Crank motion, with the crank-wrist working in a slotted yoke,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 94,
  "title": "Variable crank, two circular plates revolving on the same center",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 95,
  "title": "On rotating the upright shaft, reciprocating rectilinear motion is…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 96,
  "title": "A heart-cam",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 97,
  "title": "This is a heart-cam, similar to 96, except that it is grooved",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 98,
  "title": "Irregular vibrating motion is produced by the rotation of the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 99,
  "title": "Spiral guide attached to the face of a disk",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 100,
  "title": "Quick return crank motion, applicable to shaping machines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 101,
  "title": "Rectilinear motion of horizontal bar, by means of vibrating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 102,
  "title": "Common screw bolt and nut",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 103,
  "title": "Rectilinear motion of slide produced by the rotation of screw",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 104,
  "title": "In this, rotary motion is imparted to the wheel by the rotation of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 105,
  "title": "Screw stamping-press",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 106,
  "title": "Uniform reciprocating rectilinear motion, produced by rotary…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 106–107",
  "page": null
 },
 {
  "number": 107,
  "title": "Uniform reciprocating rectilinear motion, produced by rotary…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 106–107",
  "page": null
 },
 {
  "number": 108,
  "title": "Uniform reciprocating rectilinear motion from uniform rotary…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 109,
  "title": "The rotation of the screw at the left-hand side produces a uniform…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 110,
  "title": "Uniform circular into uniform rectilinear motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 111,
  "title": "Micrometer screw",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 112,
  "title": "Persian drill",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 113,
  "title": "Circular into rectilinear motion, or vice versa, by means of rack…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 114,
  "title": "Uniform circular motion into reciprocating rectilinear motion, by…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 115,
  "title": "Rotary motion of the toothed wheels produces rectilinear motion of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 116,
  "title": "A substitute for the crank",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 117,
  "title": "A cam acting between two friction-rollers in a yoke",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 118,
  "title": "A mode of doubling the length of stroke of a piston-rod, or the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 119,
  "title": "Reciprocating rectilinear motion of the bar carrying the oblong…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 120,
  "title": "Each jaw is attached to one of the two segments, one of which has…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 121,
  "title": "Alternating rectilinear motion of the rod attached to the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 122,
  "title": "The rotation of the two spur-gears, with crank-wrists attached,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 123,
  "title": "Intended as a substitute for the crank",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 124,
  "title": "Fiddle drill",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 125,
  "title": "A modification of the motion shown in 122, but of a more complex…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 126,
  "title": "A bell-crank lever, used for changing the direction of any force",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 127,
  "title": "Motion used in air-pumps",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 128,
  "title": "A continuous rotary motion of the shaft carrying the three wipers…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 129,
  "title": "Chinese windlass",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 130,
  "title": "Shears for cutting iron plates, etc",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 131,
  "title": "On rotating the disk carrying the crank-pin working in the slotted…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 132,
  "title": "This is a motion which has been used in presses to produce the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 133,
  "title": "A simple press motion is given through the hand-crank on the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 134,
  "title": "Uniform circular motion into rectilinear by means of a rope or…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 135,
  "title": "Modification of the triangular eccentric 91, used on the steam…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 136,
  "title": "A cam-wheel—of which a side view is shown—has its rim formed into…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 137,
  "title": "Expansion eccentric used in France to work the slide-valve of a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 138,
  "title": "On turning the cam at the bottom a variable alternating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 139,
  "title": "The internal rack, carried by the rectangular frame, is free to…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 140,
  "title": "The toggle-joint arranged for a punching machine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 141,
  "title": "Endless-band saw",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 142,
  "title": "Movement used for varying the length of the traversing guide-bar…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 143,
  "title": "Circular motion into alternate rectilinear motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 144,
  "title": "A system of crossed levers, termed “Lazy Tongs.” A short…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 145,
  "title": "Reciprocating curvilinear motion of the beam gives a continuous…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 146,
  "title": "Continuous rotary motion of the disk produces reciprocating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 147,
  "title": "Steam engine governor",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 148,
  "title": "Continuous circular motion of the spur-gears produces alternate…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 149,
  "title": "Uniform circular converted, by the cams acting upon the levers,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 150,
  "title": "A valve motion for working steam expansively",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 151,
  "title": "Continuous circular into continuous but much slower rectilinear motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 152,
  "title": "An ellipsograph",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 153,
  "title": "Circular motion into alternating rectilinear motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 154,
  "title": "Circular motion into alternating rectilinear motion, by the action…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 155,
  "title": "Reciprocating rectilinear motion into intermittent circular motion…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 156,
  "title": "Circular motion into variable alternating rectilinear motion, by…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 157,
  "title": "A modification of the movement last described",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 158,
  "title": "Reciprocating curvilinear motion of the treadle gives a circular…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 159,
  "title": "A modification of 158, a cord and pulley being substituted for the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 160,
  "title": "Alternating curvilinear motion into alternating circular",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 161,
  "title": "Centrifugal governor for steam engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 162,
  "title": "Water-wheel governor acting on the same principle as 161, but by…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 163,
  "title": "Another arrangement for a water-wheel governor",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 164,
  "title": "A knee-lever, differing slightly from the toggle-joint shown in…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 165,
  "title": "Circular into rectilinear motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 166,
  "title": "The rotation of the disk carrying the crank pin gives a to-and-fro…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 167,
  "title": "A drum or cylinder having an endless spiral groove extending all…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 168,
  "title": "The slotted crank at the left hand of the figure is on the main…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 169,
  "title": "A modification of 168, in which a link is used to connect the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 170,
  "title": "Another form of steam engine governor",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 171,
  "title": "Valve motion and reversing gear used in oscillating marine engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 172,
  "title": "A mode of obtaining an egg-shaped elliptical movement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 173,
  "title": "A movement used in silk machinery for the same purpose as that…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 174,
  "title": "Carpenters’ bench-clamp",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 175,
  "title": "A means of giving one complete revolution to the crank of an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 176,
  "title": "Contrivance for uncoupling engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 176–177",
  "page": null
 },
 {
  "number": 177,
  "title": "Contrivance for uncoupling engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 176–177",
  "page": null
 },
 {
  "number": 178,
  "title": "Contrivance for varying the speed of the slide carrying the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 179,
  "title": "Reversing-gear for a single engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 180,
  "title": "This only differs from 174 in being composed of a single pivoted…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 181,
  "title": "Diagonal catch or hand-gear used in large blowing and pumping engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 181–182",
  "page": null
 },
 {
  "number": 182,
  "title": "Diagonal catch or hand-gear used in large blowing and pumping engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 181–182",
  "page": null
 },
 {
  "number": 183,
  "title": "Represent a modification of 181 and 182, the diagonal catches…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 183–184",
  "page": null
 },
 {
  "number": 184,
  "title": "Represent a modification of 181 and 182, the diagonal catches…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 183–184",
  "page": null
 },
 {
  "number": 185,
  "title": "Link-motion valve-gear of a locomotive",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 186,
  "title": "Apparatus for disengaging the eccentric-rod from the valve-gear",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 187,
  "title": "Modifications of 186.",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 187–188",
  "page": null
 },
 {
  "number": 188,
  "title": "Modifications of 186.",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 187–188",
  "page": null
 },
 {
  "number": 189,
  "title": "Another modification of 186.",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 190,
  "title": "A screw-clamp",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 191,
  "title": "Scroll-gears for obtaining a gradually increasing speed",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 192,
  "title": "A variety of what is known as the “mangle-wheel.” One variety of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 193,
  "title": "Another kind of mangle-wheel with its pinion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 194,
  "title": "Another mangle-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 195,
  "title": "A mode of driving a pair of feed-rolls, the opposite surfaces of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 196,
  "title": "The pinion, B, rotates about a fixed axis and gives an irregular…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 197,
  "title": "What is called a “mangle-rack.” A continuous rotation of the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 198,
  "title": "A modification of 197. In this the pinion revolves, but does not…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 199,
  "title": "Another form of mangle-rack",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 200,
  "title": "A mode of obtaining two different speeds on the same shaft from…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 201,
  "title": "A continual rotation of the pinion (obtained through the irregular…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 202,
  "title": "Worm or endless screw and worm-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 203,
  "title": "A regular vibrating movement of the curved slotted arm gives a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 204,
  "title": "An illustration of the transmission of rotary motion from one…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 205,
  "title": "A wheel driven by a pinion of two teeth",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 206,
  "title": "A continuous circular movement of the ratchet-wheel, produced by…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 207,
  "title": "A modification of 195 by means of two worms and worm-wheels",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 208,
  "title": "A pin-wheel and slotted pinion, by which three changes of speed…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 209,
  "title": "A mode of obtaining motion from rolling contact",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 210,
  "title": "By turning the shaft carrying the curved slotted arm, a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 211,
  "title": "A continuous rotary motion of the large wheel gives an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 212,
  "title": "What is called the “Geneva-stop,” used in Swiss watches to limit…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 213,
  "title": "Another kind of stop for the same purpose",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 214,
  "title": "Other modifications of the stop, the operations of which will be…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 214–215",
  "page": null
 },
 {
  "number": 215,
  "title": "Other modifications of the stop, the operations of which will be…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 214–215",
  "page": null
 },
 {
  "number": 216,
  "title": "The external and internal mutilated cog-wheels work alternately…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 217,
  "title": "These are parts of the same movement, which has been used for…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 217–218",
  "page": null
 },
 {
  "number": 218,
  "title": "These are parts of the same movement, which has been used for…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 217–218",
  "page": null
 },
 {
  "number": 219,
  "title": "Variable circular motion by crown-wheel and pinion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 220,
  "title": "The two crank-shafts are parallel in direction, but not in line…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 221,
  "title": "Irregular circular motion imparted to wheel, A. C is an elliptical…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 222,
  "title": "If for the eccentric wheel described in the last figure an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 223,
  "title": "An arrangement for obtaining variable circular motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 224,
  "title": "This represents an expanding pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 225,
  "title": "Intermittent circular motion of the ratchet-wheel from vibratory…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 226,
  "title": "This movement is designed to double the speed by gears of equal…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 227,
  "title": "A chain and chain pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 228,
  "title": "Another kind of chain and pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 229,
  "title": "Another variety",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 230,
  "title": "Circular motion into ditto",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 231,
  "title": "Drag-link motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 232,
  "title": "Intermittent circular motion is imparted to the toothed wheel by…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 233,
  "title": "Two different kinds of stops for a lantern-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 234,
  "title": "A verge escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 235,
  "title": "The oscillation of the tappet-arm produces an intermittent rotary…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 236,
  "title": "A nearly continuous circular motion is imparted to the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 237,
  "title": "A reciprocating circular motion of the top arm makes its attached…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 238,
  "title": "An escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 239,
  "title": "An arrangement of stops for a spur-gear",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 240,
  "title": "Varieties of stops for a ratchet-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 241,
  "title": "Intermittent circular motion is imparted to the wheel, A, by the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 242,
  "title": "A brake used in cranes and hoisting machines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 243,
  "title": "A mode of transmitting power from a horizontal shaft to two…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 244,
  "title": "A dynamometer, or instrument used for ascertaining the amount of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 245,
  "title": "Bayonet joint",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 246,
  "title": "A pantograph for copying, enlarging, and reducing plans, etc",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 247,
  "title": "A mode of releasing a sounding-weight",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 248,
  "title": "Union coupling",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 249,
  "title": "Ball-and-socket joint, arranged for tubing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 250,
  "title": "Anti-friction bearing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 251,
  "title": "Releasing-hook, used in pile-driving machines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 252,
  "title": "A and B are two rollers which require to be equally moved to and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 253,
  "title": "Centrifugal check-hooks, for preventing accidents in case of the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 254,
  "title": "A sprocket-wheel to drive or to be driven by a chain",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 255,
  "title": "A flanged pulley to drive or be driven by a flat belt",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 256,
  "title": "A plain pulley for a flat belt",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 257,
  "title": "A concave-grooved pulley for a round band",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 258,
  "title": "A smooth-surface V-grooved pulley for a round band",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 259,
  "title": "A V-grooved pulley having its groove notched to increase the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 260,
  "title": "A differential movement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 261,
  "title": "A combination movement, in which the weight, W, moves vertically…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 262,
  "title": "The first of these figures is an end view, and the second a side…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 263,
  "title": "The first of these figures is an end view, and the second a side…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 264,
  "title": "Two worm-wheels of equal diameter, but one having one tooth more…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 265,
  "title": "Variable motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 266,
  "title": "The shaft has two screws of different pitches cut on it, one…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 267,
  "title": "Friction pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 268,
  "title": "Circular into reciprocating motion by means of a crank and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 269,
  "title": "Continued rectilinear movement of the frame with mutilated racks…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 270,
  "title": "Anti-friction bearing for a pulley",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 271,
  "title": "On vibrating the lever to which the two pawls are attached, a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 272,
  "title": "Rotary motion of the beveled disk cam gives a reciprocating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 273,
  "title": "Rectilinear into rectilinear motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 274,
  "title": "An engine-governor",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 275,
  "title": "Rotary motion of the worm gives a rectilinear motion to the rack",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 276,
  "title": "Continuous rotary motion of the cam gives a reciprocating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 277,
  "title": "Col",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 278,
  "title": "C. R. Otis’s safety-stop for the platform of a hoisting apparatus",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 279,
  "title": "Crank and slotted cross-head, with Clayton’s sliding journal-box…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 280,
  "title": "A mode of working a windlass",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 281,
  "title": "The revolution of the disk causes the lever at the right to…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 282,
  "title": "By the revolution of the disk in which is fixed a pin working in a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 283,
  "title": "By a vibratory motion of the handle, motion is communicated by the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 284,
  "title": "A feeding apparatus for the bed of a sawing machine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 285,
  "title": "The movable head of a turning lathe",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 286,
  "title": "Toe and lifter for working puppet valves in steam engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 287,
  "title": "Pickering’s governor",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 288,
  "title": "The former is what is termed a recoil, and the latter a repose or…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 288–289",
  "page": null
 },
 {
  "number": 289,
  "title": "The former is what is termed a recoil, and the latter a repose or…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 288–289",
  "page": null
 },
 {
  "number": 290,
  "title": "Another kind of pendulum escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 291,
  "title": "Arnold’s chronometer or free escapement, sometimes used in watches",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 292,
  "title": "Stud escapement, used in large clocks",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 293,
  "title": "Duplex escapement, for watches, so called from partaking of the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 294,
  "title": "A cylinder escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 294–295",
  "page": null
 },
 {
  "number": 295,
  "title": "A cylinder escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 294–295",
  "page": null
 },
 {
  "number": 296,
  "title": "Lever escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 297,
  "title": "An escapement with a lantern wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 298,
  "title": "An old-fashioned watch escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 299,
  "title": "An old-fashioned clock escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 300,
  "title": "A clock or watch escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 300–301",
  "page": null
 },
 {
  "number": 301,
  "title": "A clock or watch escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 300–301",
  "page": null
 },
 {
  "number": 302,
  "title": "Balance-wheel escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 303,
  "title": "Dead-beat Pendulum Escapement",
  "status": "done",
  "physically_driven": true,
  "mechanism": "escapement (contact only: 30 forward-leaning Graham teeth against convex-hull pallets whose locking faces are arcs about the arbor; constant-torque weight on the wheel; pendulum under gravity)",
  "measured": "pass: period 0.891 s vs compound pendulum 0.882 s (+1.0%; simple 2π√(L/g), L = 20 cm: 0.897 s); wheel 0.1048 rad per beat (half a tooth, 0.1047); locked wheel still to ±0.004° as the pallets slide (dead beat), largest run-back 0.08° (drop rebound); amplitude 5.2° sustained over 20 s; weight removed → 5.2° → 0.7° in 6 s",
  "notes": "Only the escape wheel is driven (constant torque, as a weight). Starts itself from rest. Lift 2.5°, lock 1.5°, drop 1.5°.",
  "page": "https://507simulations.com/movement/303/"
 },
 {
  "number": 304,
  "title": "Pin-wheel escapement, somewhat resembling the stud escapement…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 305,
  "title": "A single-pin pendulum escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 306,
  "title": "Three-legged pendulum escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 307,
  "title": "A modification of the above with long stopping teeth, D and E, A…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 308,
  "title": "A detached pendulum escapement, leaving the pendulum, P, free or…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 309,
  "title": "Mudge’s gravity escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 310,
  "title": "Three-legged gravity escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 311,
  "title": "Double three-legged gravity escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 312,
  "title": "Bloxam’s gravity escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 313,
  "title": "Chronometer escapement, the form now commonly constructed",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 314,
  "title": "Lever chronometer escapement",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 315,
  "title": "Conical pendulum, hung by a thin piece of round wire",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 316,
  "title": "Mercurial compensation pendulum",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 317,
  "title": "Compound bar compensation pendulum",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 318,
  "title": "Watch regulator",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 319,
  "title": "Compensation balance",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 320,
  "title": "Endless chain, maintaining power on going-barrel, to keep a clock…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 321,
  "title": "Harrison’s “going-barrel.” Larger ratchet-wheel, to which the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 322,
  "title": "A very convenient construction of parallel ruler for drawing, made…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 323,
  "title": "Parallel ruler consisting of a simple straight ruler, B, with an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 324,
  "title": "Compound parallel ruler, composed of two simple rulers, A, A,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 325,
  "title": "Parallel ruler composed of two simple rulers, A, B, connected by…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 326,
  "title": "A simple means of guiding or obtaining a parallel motion of the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 327,
  "title": "Differs from 326 in having rollers substituted for the slides on…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 328,
  "title": "A parallel motion invented by Dr",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 329,
  "title": "A piston-rod guide",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 330,
  "title": "The piston-rod is prolonged and works in a guide, A, which is in…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 331,
  "title": "An engine with crank motion like that represented in 93 and 279 of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 332,
  "title": "A parallel motion used for the piston-rod of side lever marine engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 333,
  "title": "A parallel motion used only in particular cases",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 334,
  "title": "A parallel motion used in some of the old single-acting beam engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 335,
  "title": "A parallel motion commonly used for stationary beam engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 336,
  "title": "An arrangement of parallel motion for side lever marine engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 337,
  "title": "Parallel motion in which the radius rod is connected with the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 338,
  "title": "Another modification, in which the radius bar is placed above the beam",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 339,
  "title": "Parallel motion for direct action engines",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 340,
  "title": "Another parallel motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 341,
  "title": "“Grasshopper” beam engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 342,
  "title": "Old-fashioned single-acting beam pumping engine on the atmospheric…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 343,
  "title": "Parallel motion for upright engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 344,
  "title": "Oscillating engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 345,
  "title": "Inverted oscillating or pendulum engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 346,
  "title": "Table engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 347,
  "title": "Section of disk engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 348,
  "title": "Mode of obtaining two reciprocating movements of a rod by one…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 349,
  "title": "Another form of parallel ruler",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 350,
  "title": "Traverse or to-and-fro motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 351,
  "title": "Stamp",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 352,
  "title": "Another arrangement of the Chinese windlass illustrated by 129 of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 353,
  "title": "A modification of the tilt or trip hammer, illustrated by 72. In…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 354,
  "title": "A modification of the crank and slotted cross-head, 93. The…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 355,
  "title": "The gyroscope or rotascope, an instrument illustrating the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 356,
  "title": "Bohnenberger’s machine illustrating the same tendency of rotating…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 357,
  "title": "What is called the gyroscope governor, for steam engines, etc.,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 358,
  "title": "Traverse of carriage, made variable by fusee according to the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 359,
  "title": "Primitive drilling apparatus",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 360,
  "title": "Continuous rotary motion from oscillating",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 361,
  "title": "Another simple form of clutch for pulleys, consisting of a pin on…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 362,
  "title": "Alternating traverse of upper shaft and its drum, produced by pin…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 363,
  "title": "See-saw, one of the simplest illustrations of a limited…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 364,
  "title": "Intermittent rotary motion from continuous rotary motion about an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 365,
  "title": "Cylindrical rod arranged between two rollers, the axes of which…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 366,
  "title": "Drilling machine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 367,
  "title": "A parallel ruler with which lines may be drawn at required…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 368,
  "title": "Describing spiral line on a cylinder",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 369,
  "title": "Cycloidal surfaces, causing pendulum to move in cycloidal curve,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 370,
  "title": "Motion for polishing mirrors, the rubbing of which should be…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 371,
  "title": "Modification of mangle-wheel motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 372,
  "title": "White’s dynamometer, for determining the amount of power required…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 373,
  "title": "Robert’s contrivance for proving that friction of a wheel carriage…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 374,
  "title": "Rotary motion of shaft from treadle by means of an endless band…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 375,
  "title": "Pair of edge runners or chasers for crushing or grinding",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 376,
  "title": "Tread-wheel horse-power turned by the weight of an animal…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 377,
  "title": "The tread-mill employed in jails in some countries for exercising…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 378,
  "title": "Saw for cutting trees by motion of pendulum, is represented as…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 379,
  "title": "Portable cramp drills",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 379–380",
  "page": null
 },
 {
  "number": 380,
  "title": "Portable cramp drills",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 379–380",
  "page": null
 },
 {
  "number": 381,
  "title": "Bowery’s joiner’s clamp, plan and transverse section",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 382,
  "title": "Adjustable stand for mirrors, etc., by which a glass or other…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 383,
  "title": "The principal elements of machinery for dressing cloth and warps,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 384,
  "title": "Helicograph, or instrument for describing helices",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 385,
  "title": "Contrivance employed in Russia for shutting doors",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 386,
  "title": "Folding library ladder",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 387,
  "title": "Self-adjusting step-ladder for wharfs at which there are rise and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 388,
  "title": "Feed-motion of Woodworth’s planing machine, a smooth supporting…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 389,
  "title": "Lifting-jack operated by an eccentric, pawl, and ratchet",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 390,
  "title": "Device for converting oscillating into rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 391,
  "title": "Reciprocating into rotary motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 392,
  "title": "Gig-saw, the lower end connected with a crank which works it, and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 393,
  "title": "Contrivance for polishing lenses and bodies of spherical form",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 394,
  "title": "C. Parsons’s patent device for converting reciprocating motion…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 395,
  "title": "Four-way cock, used many years ago on steam engines to admit and…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 396,
  "title": "G. P. Reed’s patent anchor and lever escapement for watches",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 397,
  "title": "Continuous circular into intermittent rectilinear reciprocating",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 398,
  "title": "Continuous circular motion into intermittent circular—the cam, C,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 399,
  "title": "A method of repairing chains, or tightening chains used as guys or…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 400,
  "title": "Four-motion feed (A. B. Wilson’s patent), used on Wheeler &…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 401,
  "title": "E. P. Brownell’s patent crank-motion to obviate dead-centers",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 402,
  "title": "G. O. Guernsey’s patent escapement for watches",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 403,
  "title": "Cyclograph for describing circular arcs in drawings where the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 404,
  "title": "Another cyclograph",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 405,
  "title": "Mechanical means of describing hyperbolas, their foci and vertices…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 406,
  "title": "Mechanical means of describing parabolas, the base, altitude,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 407,
  "title": "Instrument for describing pointed arches",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 408,
  "title": "Centrolinead for drawing lines toward an inaccessible or…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 409,
  "title": "Proportional compasses used in copying drawings on a given larger…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 410,
  "title": "Bisecting gauge",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 411,
  "title": "Self-recording level for surveyors",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 412,
  "title": "Wheel-work in the base of capstan",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 413,
  "title": "J. W. Howlett’s patent adjustable frictional gearing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 414,
  "title": "Scroll gear and sliding pinion, to produce an increasing velocity…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 415,
  "title": "P. Dickson’s patent device for converting an oscillating motion…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 416,
  "title": "A device for assisting the crank of a treadle motion over the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 417,
  "title": "Continuous circular motion into a rectilinear reciprocating",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 418,
  "title": "Buchanan & Righter’s patent slide-valve motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 419,
  "title": "Continuous circular motion converted into a rocking motion",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 420,
  "title": "Arrangement of hammer for striking bells",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 421,
  "title": "Trunk engine used for marine purposes",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 422,
  "title": "Oscillating piston engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 423,
  "title": "Root’s patent double-quadrant engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 424,
  "title": "Root’s double-reciprocating or square piston engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 425,
  "title": "One of the many forms of rotary engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 426,
  "title": "Another form of rotary engine, in which there are two stationary…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 427,
  "title": "Another rotary engine, in which the shaft, B, works in fixed…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 428,
  "title": "The india-rubber rotary engine in which the cylinder has a…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 429,
  "title": "Holly’s patent double-elliptical rotary engine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 430,
  "title": "Overshot water-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 431,
  "title": "Undershot water-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 432,
  "title": "Breast-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 433,
  "title": "Horizontal overshot water-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 434,
  "title": "A plan view of the Fourneyron turbine water-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 435,
  "title": "Warren’s central discharge turbine, plan view",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 436,
  "title": "Jonval turbine",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 437,
  "title": "Volute wheel, having radial vanes, a, against which the water…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 438,
  "title": "Barker’s or reaction mill",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 439,
  "title": "A method of obtaining a reciprocating motion from a continuous…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 440,
  "title": "A trough divided transversely into equal parts and supported on an…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 441,
  "title": "Persian wheel, used in Eastern countries for irrigation",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 442,
  "title": "Machine of ancient origin, still employed on the river Eisach, in…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 443,
  "title": "Application of Archimedes’s screw to raising water, the supply…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 444,
  "title": "Montgolfier’s hydraulic ram",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 445,
  "title": "D’Ectol’s oscillating column, for elevating a portion of a given…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 445–446",
  "page": null
 },
 {
  "number": 446,
  "title": "D’Ectol’s oscillating column, for elevating a portion of a given…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "shared plate 445–446",
  "page": null
 },
 {
  "number": 447,
  "title": "This method of passing a boat from one shore of a river to the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 448,
  "title": "Common lift pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 449,
  "title": "Modern lifting pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 450,
  "title": "Ordinary force pump, with two valves",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 451,
  "title": "Force pump, same as above, with addition of air-chamber to the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 452,
  "title": "Double-acting pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 453,
  "title": "Double lantern-bellows pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 454,
  "title": "Diaphragm forcing pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 455,
  "title": "Old rotary pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 456,
  "title": "Cary’s rotary pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 457,
  "title": "Common mode of raising water from wells of inconsiderable depth",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 458,
  "title": "The common pulley and buckets for raising water",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 459,
  "title": "Reciprocating lift for wells",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 460,
  "title": "Fairbairn’s bailing-scoop, for elevating water short distances",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 461,
  "title": "Pendulums or swinging gutters for raising water by their pendulous…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 462,
  "title": "Chain pump",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 463,
  "title": "Self-acting weir and scouring sluice",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 464,
  "title": "Hero’s fountain",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 465,
  "title": "Balance pumps",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 466,
  "title": "Hydrostatic press",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 467,
  "title": "Robertson’s hydrostatic jack",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 468,
  "title": "Flexible water main, plan and section",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 469,
  "title": "French invention for obtaining rotary motion from different…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 470,
  "title": "Steam hammer",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 471,
  "title": "Hotchkiss’s atmospheric hammer",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 472,
  "title": "Grimshaw’s compressed air hammer",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 473,
  "title": "Air-pump of simple construction",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 474,
  "title": "Æolipile or Hero’s steam toy, described by Hero, of Alexandria,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 475,
  "title": "Bilge ejector (Brear’s patent) for discharging bilge-water from…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 476,
  "title": "Another apparatus operating on the same principle as the foregoing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 477,
  "title": "Steam trap for shutting in steam, but providing for the escape of…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 478,
  "title": "Another steam trap (Ray’s patent)",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 479,
  "title": "Gasometer",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 480,
  "title": "Another kind of gasometer",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 481,
  "title": "Wet gas meter",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 482,
  "title": "Gas regulator (Powers’s patent) for equalizing the supply of gas…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 483,
  "title": "Dry gas meter",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 484,
  "title": "A spiral wound round a cylinder to convert the motion of the wind…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 485,
  "title": "Common wind-mill, illustrating the production of circular motion…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 486,
  "title": "Plan of a vertical wind-mill",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 487,
  "title": "Common paddle-wheel for propelling vessels",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 488,
  "title": "Screw propeller",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 489,
  "title": "Vertical bucket paddle-wheel",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 490,
  "title": "Ordinary steering apparatus",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 491,
  "title": "Capstan",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 492,
  "title": "Boat-detaching hook (Brown & Level’s)",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 493,
  "title": "“Lewis,” for lifting stone in building",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 494,
  "title": "Tongs for lifting stones, etc",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 495,
  "title": "Entwistle’s patent gearing",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 496,
  "title": "Drawing and twisting in spinning cotton, wool, etc",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 497,
  "title": "Fan-blower",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 498,
  "title": "Siphon pressure gauge",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 499,
  "title": "Aneroid gauge, known as the “Bourdon gauge,” from the name of its…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 500,
  "title": "Pressure gauge now most commonly used",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 501,
  "title": "Mercurial barometer",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 502,
  "title": "An “epicyclic train.” Any train of gearing the axes of the wheels…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 503,
  "title": "A very simple form of the epicyclic train, in which F, G, is the…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 504,
  "title": "“Ferguson’s mechanical paradox,” designed to show a curious…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 505,
  "title": "Another simple form of the epicyclic train, in which the arm, D,…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 506,
  "title": "Another epicyclic train in which neither the first nor last wheel…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 },
 {
  "number": 507,
  "title": "Another form of epicyclic train designed for producing a very slow…",
  "status": "todo",
  "physically_driven": false,
  "mechanism": "",
  "measured": "",
  "notes": "",
  "page": null
 }
]