Anaxagoras on aerolites, 122; on the surrounding ether, 134.
Andes, the, their altitude, etc. See Cordilleras.
Anghiera, Peter Martyr de, remarked that the palmeta and pineta were found associated together, 282, 283; first recognized (1510) that the limit of perpetual snow continues to ascend as we approach the equator, 329.
Animal life, its universality, 342-345; as viewed with microscopic powers of vision, 341-346; rapid propagation and tenacity of life in animalcules, 344-346; geography of, 341-346.
Anning, Miss Mary, discovery of the ink bag of the sepia, and of coprolites of fish, in the lias of Lyme Regis, 271, 272.
Austed's, D. R., "Ancient World." See notes by Translator, 271, 272, 274, 281, 287.
Aplan, Peter, on comets, 101.
Apollonius Myndius, described the paths of comets, 103.
Arago, his ocular micrometer, 39; chromatic polarization, 52; optical considerations, 85; on comets, 99-106; polarization experiments on the light of comets, 105; aerolites, 114; on the November fall of meteors, 124; zodiacal light, 143; motion of the solar system, 146, 147; on the increase of heat at increasing depths, 173, 174; magnetism of rotation, 179, 180; horary observations of declination at Paris compared with simultaneous perturbations at Kasan, 191; discovery of the influence of magnetic storms on the course of the needle, 194, 195; on south polar bands, 198; on terrestrial light, 202; phenomenon of supplementary rainbows, 220; observed the deepest Artesian wells to be the warmest, 223; explanation of the absence of a refrigeration of temperature in the lower strata of the Mediterranean, 303; observations on the mean annual quantity of rain in Paris, 333; his investigations on the evolution of lightning, 337.
Argelander on the comet of 1811, 109; on the motion of the solar system, 146, 149; on the light of the Aurora, 195, 196.