Chapter D

Dead-beat escapement, 328
Definition of force, 2
Deflection of a beam, Table XXIII. 182
Differential pulley, 112
Table XI. 114
Direction of a force, 5

E.
Eade, Mr., epicycloidal pulley-block, 116
Easter Island, 100
Elasticity of beam, 184
Energy, 85, 94
storage of, 256, 258
unit of, 95
Engine, locomotive, 83
Epicycloidal pulley-block, 80, 116
Table XII. 118
Equilibrium, neutral, 61
of a bar, 38, 41
three forces, 6
two forces, 6
stable, 59
unstable, 59
Escapement, 324
dead-beat, 328
recoil, 328
Expansion of bodies, 321
Experiment by M. Plateau, 273

F.
Fall in a second, 239
Falling body, motion of, 230
Feet, how represented, 7
Fibres in state of compression, 184
tension, 184
First law of motion, 230
Fly-wheel, 260
in steam-engine, 262
Foot-pound, 95
Force, a small, and two larger, 12
definition of, 2
destroying motion, 3
direction of a, 5
magnitude of a, 4
measurement of, 4
of friction, 65
gravity, 50
one, resolved into three, 26
two, 17
representation of, 5
standard of, 4
Forces, composition of, 1, 9
equilibrium of three, 6
two, 6
illustrations of, 3
in inclined plane, 136
parallel, 34
parallelogram of, 10
resolution of, 16
Formula for pulley-block, 109, 114
Framework, 203, 345
Friction, 65
accurate law of, 75
a force, 66
and pressure, 72
angle of, 78
angle of statical, 80
apparatus to show, 65, 68, 78
caused by roughness, 66
coefficient of, 74, 82
diminished, 66
excessive, 115
experimenting on, 66
in crane, 166
differential pulley-block, 113
inclined plane, 132
lever, 123
pulleys, 89
law of, 91
rope and iron bar, 87
wheel and axle, 153
wheel and barrel, 158
laws of, 73, 81, 82
mean, 75
motion impeded by, 70
nature of, 65
overcoming, 93
Table I. 69
II. 71
III. 74
IV. 76
V. 78
VI. 81
VII. 81
VIII. 81
upon axle, 155
wheels, 93

G.
Galileo and falling bodies, 235
kinetics, 230
the pendulum, 284
tower of Pisa, 233
Gathering pallet, 336
Girder, 219
as slight as possible, 221
Governor-balls, 276
Graham, dead-beat escapement, 328
Graphical construction, 339
Gravity, 50
action of, 243
and the pendulum, 292
and weight, 52
centre of, 57
defined, 246
different effects of, 53
independent of motion, 241
in London, 292
specific, 53
Grindstone, treadle of, 128

H.
Hammer, 252
theory of the, 252
Hands of a clock, 331
Horse-power, 96