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N° 131

10

II

Noria,

328

21 & 254

98

279

Morveau's experiments on capillary Resistance sustained by hemispheres, N°239 Table of the maximum effect of over.
attraction,

plane surfaces, 243 & 250

shot wheels, N° 260, 264
of fluids,

220
for overshot wheels,

267
N
Coulomb's experiments ou, 221

for breast wheels,

269
Newsham's fire-engine,

323
Hutton's,

239

for undershot wheels, 285, 286
Newton, Sir Isaac, bis discoveries in

Vince's

245 for macbines driven by the re-
hydraulics,
12 Rivers, motion of, first attended to in

action of water,

304
on the oscillation of waves, 13 & 254

Italy,

Torricelli discovers an important pro-
Nicholson's hydrometer,

107
Guglielmini's theory of,

position in bydraulics, 7.
Noble's pump,

316 Rumford, Count, on the adhesion of Torsion, the principle of, employed
4-
fluids,

133

by Coulomb to determine
0

the resistance of fluids, 221
Oscillation of waves considered by

S

Tubes, cylindrical, discharge more
Newton, 13 & 254 Screw-engine, Archimedes's,

water than simple orifices, 180
by Flaugergues, 20 & 254 Segner's form of Barker's mill,

303

conical, Poleni's experiments
by Lagrange,
Smeaton on oversbot wheels, 259, 263

with,

187
of fluids,
250 Smeaton's experiments on undershot

of various forms, Ventori's ex-
vershot wheels,

237
wheels,

286
periments with,

188
how to compute the momen- Specific gravity defined,

70

capillary, how to measure their
tum of the loaded arch, 258
gravities of bodies, how to de-

diameters,

I 20
on the diameter of, 259

termine,

94
on the proper velocity of, 260
gravity of solids, how to find, 95

U
according to Deparcieux, 261

of powders,

97
Undershot wheels,

272
Smeaton, 263
of fluids,

number of their float-
Bossut, 264
gravities, extensive table of, iii

boards, 273-275
A. Euler's researches on, 267
Sucking pump,

310

form of their floatboards, 276
Lambert's researches on, ib. Syphon, invented by Hiero,

4

position of their float:
table for,

ib.
description of,

54

boards,

277

velocity of,
P

T

mamimum effect of, ac.
Parador, hydrostatic,

44
Table of the altitudes of different fluids

cording to theory, 280
Parents'mill. See Barker's mill.
in capillary tubes by Martin, 119

maximum effect of, ac-
Pascal discovers the pressure of the
of the quantities of water dis-

cording to Smeaton, 281
atmosphere,

8
charged by different orifices, 172

maximum effect of, ac-
writes on the equilibrium of
of the quantities of water dis-

cording to Bossut, 282
fluids,

ib.
charged according to theory

tables for,

285, 286
his experiment to shew the

and experiment,

174

how to construct
gravitation of fluids,
of the results of Eytelwein's ex-

them, 284
Percussion, centre of,
periments,

Smeaton's experiments
Perfect fluids, wbat,
27 of the quantities of water dis-

on,

289
Persian wheel,

331
charged by cylindrical tubes, 182, Undulation of waves,

253
Pipes, conduit, pressure exerted on them

183 Velocity of fluids issuing from orifices, 137
by the included water,

168 of the quantities discharged by Vena contracta, discovered by Newton, 138
experiments on this subject, 213
cylindrical tubes, according

quantity of its contrac-
Poleni, marquis of, his experiments
to theory and experiment, 185

tion according to
on the motion of fluids,

14
of the quantities discharged by

different authors, 11
Pressure, centre of,

47
conical tubes,

187 Venturi discovers the lateral communi.
Pump, Ctesibius's,

309
of the quantities discharged by

cation of motion in fluids, 23
sucking,

310

orifices of various forms, 188 Vessels, time in which they are ex-
forcing,
313 shewing the time in which ves.

bausted,

155-177
lifting,

314
sels are partly exhausted, 194, 195 Vera's hair-rope macbine,

320
De la Hire's,

313 shewing the altitudes, &c. of jets, 196
Noble's,
of the quantities of water dischar.

W
Buchanan's,
ged by conduit pipes, 204-211 Waring's rules for Barker's mill,

302
balance,
shewing the pressure exerted Water blowing machine,

351
chain,

319
upon pipes,

213

clocks, theory and construe.
Q
of the velocity of water in ca.

159
Quin's bydrometer,

106
nals,

214, 215

clocks move faster in summer
shewing the resistance of hemi:

than winter,
R
spheres, cones, globes, and

fluidity of, increased by elec-
Rain wind, cause of it,

354
cylinders,

tricity and by heat,

121
Resistance sustained by cylinders, 236, 239 shewing the resistance of globes, 241 running, method of measuring
by cones, 239 shewing the resistance of plane

its velocity,

288
by globes, 239, 241

surfaces,
243, 245

instrument for,

ib.
Water

55
48

178

316
317
318

tion of,

218

239

Water wheels,

Waves, undulation of,

oscillation of,

Wheels, overshot,

breast,

undershot,

Besant's,

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