INDEX.

the Particles indicated by their Colours, ii. 260 n.Sce A lotion , Momentum , and Velocity,

Body , Circulation in the human, how accounted for,

i. 35 n. The Forces with which it is attracted withon two Spheres of the fame Density, but unequalBulk, i. 8? n. Animal, a curious Hydraulic Ma-chine, ii. 36 11. Ot a middle sized Man,- whatPressure upon, ii. Ijl. How counterbalanced, ii.ibid. Sonorous, how its Parts propagate Sound,

ii. 220. How affected by the Air, ibid. TheTremours of, how propagated, si. 227. Sonorous,how agitating the contiguous Air explained anddemonstrated, ii. 232 11.

Boerhaave , Dr. Experiment to prove the Weight ofLight insensible, ii. 227 n.

Boetius Severinus, Orrery contrived by, iii. 16 n.Bouguers direct and geometrical Computation of allthe Phienomena of a Comet moving in any conicSection, iii. 214 n,

Beyle, Mr. Experiments of, shewing the Generation ofAir from terrestrial Substances, ii. 115 n. Recom-mends Hydrostatic Knowledge, i. 316 n.

Bradley , Dr. his Discovery of the Aberrations pf thefixed Stars, ii. 278 n.

Brooks , how formed, ii. 15 n.

Burning glaffes, Nature of accounted for, ii. 285 n.Lunar Rays in the Focus of, produce no sensibleHeat, 289 n. & j'eq. Point, what, iii. 15, j6.

c

f^Amera olfctira , what, iii. 78..

^ ; Gampcna XJmiatoria, see Diving-Bell.

Canton, Mr. electrical Experiments hr, i. 52, 67.Capillary Hypothesis of the Origin of Springs insuf-ficient, ii. 11 n. Glass I ubes, Phænomena of with

Water accounted for, i. 32 n. Heights of the Fluidin different Tubes invenely as the Diameters de-monstrated, i. 25 n. With Quicksilver the Phæno-mena are the Reverse of that with Water, 26 n,

Confide-