INDEX AND GLOSSARY TO THE THREE VOLUMES. ABSORB, to drink in. A Acceleration, a body moving faster and faster. Action and re-action, equal and contrary, Vol. i. 70. Curious instance of, i. 71. Adhesion, a sticking together. P. Air, a fluid, the pressure of which is very great, ii. 137, 138. Its pressure, experiments on, ii. 152-160. Its weight, how proved, ii. 161. Its elasticity, ii. 166-170. Its compression, ii. 174 -178. Necessary to sound, ii. 186. Air-gun, structure of, explained, ii. 183, 184. Air-pump described, ii. 141. Its structure explained, ii. 142-144. Experiments on, ii. 145 and 179. F Alcohol, ardent spirit: equal parts of alcohol and Alkaline, a saline taste. Anamorphoses, distorted images of bodies. Ancients, their mode of describing the constella- Angle, what it is, i. 11. How explained, ib. Right, Animals, all kinds of, affected by Galvanism, iii. 243. Aperture, a small hole. Aphelion, the greatest distance of a planet from the sun. Apogee, the sun's or moon's greatest distance from Aquafortis, of what composed, i. 15. Archimedes, proposed to move the earth, i. 76. 45. Atmosphere, the effect of, iii. 30, 31. Attraction, the tendency which some parts of mat- Attraction, capillary, what meant by, i. 24. Illus- Attraction and Repulsion, electrical, iii. 151 and 169. magnetic, iii. 131, &c. B Balance, hydrostatical, described, ii. 75. Ball, why easily rolled, i. 49. Scioptric, its effect, Barometer, explained, ii. 162 and 244-250. Its Battery, electrical, iii. 189, &c. Experiments on, Beccaria, his observation, iii. 215. Birds, how they support themselves in the air, i. 62. Bissextile, the meaning of the word, i. 191. Bodies, heavenly, why move in a curved path, i. Boyle, Mr. first saw the electrical light, iii. 149. 211. Bucket, how suspended on the edge of a table, i, 55. Buffon, M. his experiments, iii. 62. Bullets, leaden, how made to cohere, i. 20. VOL. III.-Z C Camera obscura, iii. 119, &c. Capillary attraction, fluids attracted above their Cardinal points, how distinguished, i. 124. Centre of gravity, the point of a body, on which, Centrifugal force, is the tendency which a body Centripetal force, is the tendency which a body Chatterton, his lines on the solar system, i. 148. Clocks and Dials, why not agree in the measure of Cohesion, attraction of, i. 18. How defined, i. 19. Coining, apparatus for, referred to, i. 113. Comets, in what respects they resemble planets, i. Condensation, the act of bringing the parts of mat- ter together. Conductors, electrical, what meant by, iii. 154. Cone, double, why it rolls up a plane, i. 54. Converge, drawing towards a point. Cookery, some operations of, how accounted for, Crane, the principles of a, i. 94. One invented by Mr. White, i. 95. Distiller's described, ii. 113. D Dancers, rope or wire, how they balance them- Day, astronomical, when begins, i. 138. The dif Days and Nights, why of different lengths, i. 166, Density, compactness. Constitutes specific gravi- |