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. plane surfaces, 243 & 250 shot wheels, N° 260, 264 220 267 for breast wheels, 269 323 239 for undershot wheels, 285, 286 Vince's 245 for macbines driven by the re- action of water, 304 Italy, Torricelli discovers an important pro- 107 position in bydraulics, 7. 316 Rumford, Count, on the adhesion of Torsion, the principle of, employed 133 by Coulomb to determine the resistance of fluids, 221 S Tubes, cylindrical, discharge more water than simple orifices, 180 303 conical, Poleni's experiments with, 187 of various forms, Ventori's ex- 237 286 188 70 capillary, how to measure their diameters, I 20 termine, 94 U of powders, 97 272 number of their float- boards, 273-275 310 form of their floatboards, 276 4 position of their float: ib. 54 boards, 277 velocity of, T mamimum effect of, ac. 44 cording to theory, 280 maximum effect of, ac- cording to Smeaton, 281 8 maximum effect of, ac- cording to Bossut, 282 ib. tables for, 285, 286 and experiment, 174 how to construct them, 284 Smeaton's experiments on, 289 331 253 183 Velocity of fluids issuing from orifices, 137 168 of the quantities discharged by Vena contracta, discovered by Newton, 138 quantity of its contrac- tion according to 14 different authors, 11 47 187 Venturi discovers the lateral communi. 309 cation of motion in fluids, 23 310 orifices of various forms, 188 Vessels, time in which they are ex- bausted, 155-177 314 320 313 shewing the altitudes, &c. of jets, 196 W 302 351 319 213 clocks, theory and construe. 159 106 214, 215 clocks move faster in summer than winter, fluidity of, increased by elec- 354 tricity and by heat, 121 its velocity, 288 surfaces, instrument for, ib. 55 178 316 tion of, 218 239 |