r N D E- X.

jremote Objects, what, iii. 30 n. Indistinct Causesof, iii. 33 n.y seq. In refracting Instruments, whatthe Obstacle to, iii. 73 n. Distinctness of in Mi-croscopes and Telescopes, how,increased, iii. 385,386. Promoted by a Composition of {jlaffes, iii.389.

Vis Inertias of Matter, what, i. 11. Arises from itsSluggishness, not Gravity, ibid.

Universe, what, iii. 95 ».

Voice, passing through a Tuboor Trumpet, augmentedby Reflection, ii. 244..

W.

TT/'Atches and Clocks, the Power of, i. 189. Me.

'e chanifm of the Parts of, i. 190 n. & seq.

Water, how made a Standard by the Hydrometer, i.286 n. How conveyed to Springs, ii. 5., Motionof in Rivers and Canals, to-what owing,-ii. 7. Ris-ing in Wells accounted for, ii. 17 n.Efseq. Me-thod of raising by Heat and Cold only, ii. 68 n.How raised by Steam, ii, 74 n. The Forces of Sunand Moon for raising, computed, ii. 102 n. Pro-digious Rarefaction of, ii. 91. Elevation of by theMoon, ii. non.

Wa/er-BdlowSj new Invention, of -by- Mr .Triewald,described, ii. 219 n.

Water- Engine, fee Newjham and Engine.

Water- Mills, Parts of, i. 206. Mechanism dependingon several Principles, i. 207 n. At the Bar-Pool inWarwickjhire, i. 208 n. Calculation of the severalParts of, i. 209 n. (A seq- Ladle-boards on theWheel the greatest Essect of the Water on, i. 212 n.Dr. Barker's, i. 215 n.

Wave or Pulse of Air, what, ii. 228 41.

Wedge, what, i. 166. Power of demonstrated, i. 172 11.

Weight , absolute, of Bodies, what, i. 84 n. £5’ seq. R e .lative, what, i. 85 n.

Wells, Rise of Water in, accounted for, ii. X y n . Depthof, analytically investigated, ii. 244 n.

Wheel and Axle, what, !. 165. Particulars of, i. 17m.Ladle-board on, i. 212 n. How constructed, ibid,Jmpulfe on, i. 214 n'. Barometer described, ii. 172 n.

3 Carriages,