ABSOLUTE fall of water, page 15.
Achromatic telescope, 309. Object-glass,
double, 312. Tables of their radii,
317. Triple, 313. Tables of their
radii, 315. Eye-pieces, 323. For-
mulæ for, 324, 325.
Amontons on friction, 149.
Analemmatic dial, 381.
Anemometers, 76.
Animals, on the strength of, 2.
Axles, on the friction of, 163.
Conical pendulum, 96.
Coulomb on wind-mills, 68. On fric-
tion, 153. On the strength of men,
2. On torsion balance, 235. On ela-
sticity and cohesion, 241.
Course of discharge, 13. Of impulsion,
ib.
Cranks, single and double, 181.
Crown wheels, 177.
Cycloids, on the formation of, 140.
Cylindrical wheels and pinions, 176.
Dial, Analemmatic, 381. Lambert's,
description of, 386.
Backwater, how to keep it off from wheels, Dichroscope described, 333.
Fluid object-glass, Dr. Blair's, 323.
Fly-wheels, on the nature and operation
of, 194. How they become regula-
tors of machinery, 195. How they
become accumulators of power, 197.
Friction, how to find the momentum of,
in wind-mills, 75. Nature and effects
of, 148. Amonton's observations upon,
149. Bulfinger's, ib. Parent's, 150.
Euler's, ib. Ferguson's, 151.
sut's, ib. Vince's, 152. Coulomb's,
153. Method of diminishing the effects
of, 173. Wheels, ib. Of axles, 163.
Of ropes, 166. Of pivots, 169.
296. Compound, ib.
Mill-course, on the construction of it, 12.
Mills, on the performance of undershot,
28. Horizontal, 38. Double, 42.
Breast, 45. Overshot, 47.
Millstone, on the formation, size, and
velocity of it, 24.
Millwrights' tables, description of two on
new principles, 31-35.
Montgolfier's hydraulic ram, 288.
Motion, contrivances for transferring it,
183.
Rackwork, method of forming its teeth,
Rain wind, cause of it, 287.
Ram, hydraulic, 288.
Ramsden's achromatic eye-piece, 327.
Reflecting telescopes, 300-309. Tables
for, 301, 302, 308. New one, 307.
Refracting telescopes, 298. Table for,
Relative fall of water, 15.
Teeth of rackwork, method of forming
them, 124.
Teinometer, S'Gravesende's, 230. New
mechanical one, 231. Chromatic, 232.
Telescopes, achromatic, 309. Refracting,
298. Table for, 300. Gregorian, ib.
Table for, 301. Cassegrainian, 300.
Table for, 301. Newtonian, 303.
Table for, 306. New reflecting one,
307. Herschel's, 304, 306. Dollond's,
310. With fluid object-glasses, 323.
Regulation of machinery by fly-wheels, Thrashing machines, 267. Driven by
194.
Safety lamp, for lighting mines, 275.
Samuel's apparatus for regulating the ac-
tion of horses, 201.
Screws, endless, 180.
Single microscopes, 294.
Smeaton's maxims on undershot mills, 30.
Smeaton on windmills, 80.
Smeaton's overshot wheel, 54.
Specific gravities, table of, 390.
Specula, method of casting, grinding, and
polishing, 341.
Spur wheel, formation of, 21.
Steam-engine, 89. Watt's, 91. Steam-
gage, 101. Woolff's improvements
on, 104. High pressure engine, 107.
On the power of, and the method of
computing it, 109.
Steam boats, history of, 112. Descrip-
tion of, 116. Carriages described, 118.
Steel, on the strength of, 245.
Stones, on the strength of, 250.
Table of the strength of men, 8. Of the
strength of horses, 11. Of materials,
244. Pitches of wheels, 146. Cou-
lomb's experiments on the friction of
axles, 165. Of the number of float-
boards in undershot water wheels, ac-
cording to Pitot, 18. For millwrights,
constructed on new principles, 31–35.
For breast mills, 46. Of experiments
on overshot mills, 53. Of the velocity
of thrashing machines, 269. Of the
power of thrashing machines, 271.
For refracting telescopes, 300. For
Gregorian telescopes, 301. For Cas-
segrainian telescopes, 302. For New-
tonian telescopes, 306. Of specific
gravities, 390.
Tables for achromatic telescopes, 315.
For single microscopes, 296.
Teeth of wheels, method of forming them,
119. Method of disposing them, 138.
water, 268. Driven by horses, ib. On
the power of, 271.
Tides, on the cause of the, 388.
Timber, on the strength of, 251.
Traction, on the line of, 222.
Trundle, formation of, 125.
Torsion, on the force of, 227, 234.
Undershot water wheels, construction of,
11. Table of the number of float-
boards in, according to Pitot, 18.
Undershot mills, on the performance of
them, 28.
Undershot wheel, Besant's, 44. At
right angles to the stream, 45.
Universal joint, Hooke's, 182.
Valves, on the construction of, 97. Safety,
93.
Velocity of water, method of measuring
it, 37. Wind, method of measuring
it, 76.
Verrier's windmill, description of, 64.
Vince on friction, 152.
Water, how to measure its velocity, 37.
Water-blowing machine, 285.
Water wheel, undershot, 11. Number
of floatboards in, 18. Position of
floatboards, 21.
Wheels, on the teeth of, 119. Bevelled,
on the formation of their teeth, 135.
Friction, 173. Fly, 194.
Wheels of carriages, on the advantages of
large ones, 212.
On the position of,
221.
Wheel carriages, 210.
On the forma-
tion of, 214. How to place the centre
of gravity, 226.
Whitehurst's machine for raising water,
287.
Wind, method of finding its velocity, 76.
By Coulomb, ib.
Windmill, description of Verrier's, 64.
Those in Holland, 68. Sails, on the
formation and position of, 69. A ngle
of their inclination, according to Pa-
rent, ib.
uler's theorem concerning,
70. Euler's observations upon, 73.
Windmills, table of their power, &c. 74.
Their effect in manufacturing oil and
grinding corn, 82. Horizontal, 85.
Comparison between vertical and ho-
rizontal ones, 87. Smeaton's observa-
tions on, 80. Coulomb's, 68.
Wipers of stampers, &c. mode of form-
ing them, 126.
Woolff's steam-engine, 104.
The reader is requested to correct the following
ERRATA :
Page 16, note, dele the reference to a Supplementary Chapter on Magnetism.
Page 63, line 10 from bottom, for CD E, read A' E.
92, line 21, for f, read f'.
93, line 17, the valve v is not seen in the Figure.
98, line 3 from bottom, the syphon e is not seen in the Figure.
101, line 11, for B read 6.
107, line 6 from bottom, dele of.
for 4 C, read 4 C c.
161, line 4 from bottom, for or,
184, line 5, for circular, read circular alternating.
191, line 20, for Plate VII, read Plate V.
191, line 6 from bottom, for Fig. 11, read Fig. 9.
189, line 3 from bottom, for p D, read p D'.
274, line 14, for Fig. 16, read Fig. 14.
288, line 1, for Fig. 9, read Fig. 10.
347, for Fig. 16, read Fig. 1, and for Fig. 17, read Fig. 2.
349, for Fig. 3, read Fig. 4.
351, lines 7 and 9 from bottom, for BA B, read RAP; for ACO,
read AD; and for AD, read M T.
354, line 1 from bottom, for A B, read A D.
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