INDEX.
Aberration of light, 31
Acceleration of the moon, 39
Action, compound and disturbed, of the spheres, 12
Air, elasticity of, 90
Airy, Professor, 218, 225
Algæ, 279
Algol, the star, 388
Alps, the, 273
Amazons, river of the, 117
Andes, the, 134
Arabian science, 108
Arago, M., 135, 219, 266, 341
Arcs of the meridian, measurement of, 54, 56
Asia, north-west basin of, 133
Astronomy, physical, 1; divisions of the science of, 68, 96
Astronomical tables, 68
Atmosphere, the, 123, 129, 130, 137, 163, 296
Attraction, its power universal, 1
——— and repulsion, electrical, 29 1, 354
———, capillary, 123, 125
Aurora Borealis, 172, 299, 323
Axis of the earth, 59
Bacon, 33
Barometer, the, 131
Battery, voltaic, 304, 355
———, galvanic, 305
Biot, M., 214, 348
Birds, 283
Black, or Negro, 284
Bradley, Dr., 94
Cæsar, Julius, 100 Caloric, rays independent of light, 228, 232
——— from all substances, 239
——— diffusion, 240
——— combustion, 241
Catalogue of stars by Herschel, 392
Celestial bodies how seen, 164; phenomena of refraction, 167; atmospheres of, 252
Centrifugal force opposed to the law of gravity, 49, 52; its action on the sea, 121
Chaldeans, observations by the, 37, 40
