I

N D E X.

Syphons, what, ii. 2. Bent, accounted for, ii. 19 n.Its Nature not understood by the Ancients, ii. 21 n.Capillary, Phænomenon of accounted for, i. 35 n.

System, Mundane, what, in. 94.. Of the Wforld, threecelebrated ones, iii. 96. Solar, true one, what, iii.128, &seq. Recommends itself from right Reason,iii. 130n. Demonstratively proved by the Conjunc-tions of Mercury and Venus with the Sun, iii. 132,133 n. By the Conjunctions and Oppositions ofMars, Jupiter, and Saturn, iii. 134. By the great-est Elongation of Mercury and Venus, iii. 137. Fur-ther Proofs of, iii. 141 £5” seq. Adequately repre-sented by the Orrery, iii. 154,

T,

CT^Jhlcs of Weights to separate the Cohesion of various

-*■ Bodies, i. 20 n. Of Experiments on various Fluids,i. 28 n. Of Powers in the Lever, i. 179 n. Ofcorrespondent Parts for the Sine of every Degree, i,226 n. Of specific Gravities, i, 290 n, Of theHeight to which Jets rife, ii. 27 n, Another ascer-tained by various Experiments, 28 n. Of Experi-ments for finding the Power of Fire-Engines, ii. 84n. Of the different Altitudes of Mercury in the Ba-rometer, ii. 133 n. Of Altitudes for Mercury orWater, 139 n. Of Degrees of Heat in Sir Isaac New-ton’s Thermometer, ii. 185 n, Of the equable Mo-tion of Sound, ii. 238. Of Measures, ii. 352 n. Ofthe Longitude and Latitude of a Comet, iii. 218 n.Of the Constellations, iii. 257 seq. Of Arcs ofthe Meridian to the Spheroid in Minutes of the Equa-tor, iii. 203 n.

Tails of Comets, how found, iii, 219.

Tantalus, what Kind of Syphon, and why so called, ii.20 n.

Tautological or prattling Echoes, what, ii. 244 n.

Telescope, how many Sorts of, iii. 53. Refracting,Construction of, ibid. Power of Magnifying, iii.54. Common refracting, the Imperfection of, towhat owing, iii. 55 n. Refracting, Effect of aconcave Eye-glass instead of a convex one, what, iii.56. Disadvantage of, iii, 58. Advantage of, iii>