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INDEX. 483
Force, energy and power,
285.
of a blow how to cal-
culate, 288.
acceleration and motion
formulas for, 288.
centrifugal, 302.
Formulas, 3.
Fractions, addition of, 7, 14.
subtraction of, 8, 14.
multiplication of, 9, 15.
division of, 10, 15.
to reduce from one de-
nomination to another,
11.
to reduce a decimal to
a vulgar, 13.
to reduce a vulgar to a
decimal, 12.
Friction, 303.
axle, 305.
angle of, 306.
co-efficient of, 304, 306.
rolling, 304.
rules for, 306.
in machinery, 306.
in pulley-blocks, 307.
Frustum of a cone, 205.
surface of, 205.
volume of, 206.
Frustum of a pyramid, 207.
surface of, 207.
volume of, 207.
Fly wheels, 356.
weight of, 356.
centrifugal force in, 357.
to calculate speed of
bursted, 284.
safe speed of, 360.
safe diameter of, 360.
Gage for sheet iron and
sheet steel, 145.
for wire, 146.
for twist drills and steel
wire, 148.
Stubs’, 148.
Geometry, 149-152.
Geometrical mean, 70.
Gravity, 276.
specific, 138.
Gear teeth, 375-416.
circular pitch of, 375.
comparing circular and
diametral pitch of,
380.
cycloid form of, 382.
dimensions of teeth, 380.
Diametral pitch of, 377.
involute form of, 387.
strength of, 409.
width of, 397.
Gearing bevel, 397.
how to calculate speed
of, 322.
dimensions of tooth
parts in, 380.
dimensions of tooth
parts in bevel, 399.
worm, 403.
dimensions of tooth
parts in worm, 403.
elliptical, 408.
Grindstone, weight of, 140,
475.
speed of, 321.
H.
Hauling a load, 318.
Henry, 471.
Hubs in gears, 393.
Horse power, 317.
of a steam engine, 317.
compound or triple en-
gine, 317.
of waterfalls, 318.
Hot water heating, 454.
Hydraulics, notes on, 443.
Hyperbolic logarithms, 71,
126.
I beam, strength of, 242.
Impulse, 286.
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