ARISTOTE

Armure, 109, 118, 140, 148, 150, 151, 152, 155 (fi£.), 156, 160, 166, 185 (fig.), 186, 203, 204, 205, 226.

ARRHÉNIUS (Svante), 3, 33, 51, 55.

Arsenic, 54.

Arthrodires, 121 (fig.),152 (fis.), 154 (fig.), 156, 157, 160 (fis.), 267.

Arthropodes, 105, 112, 117, 267.

Articulés, 117, 118, 121.

Ascidies, Ascidiens, 150, 154 (fig.), 267.

Asie, 78, 216, 239, 245, 249.

Aspidosaurus, 166.

Atomes, IX, 32, 40, 55, 56, 87, 105 ; masse atomique, 28, 40, 46, 48-49, 55.

Australie, 163, 187, 217, 234, 239.

Autruches, 209, 268.

Aviron, voir Membres.

Aye-aye, 137 (fig.).

Azotobacter, 76, 71.

Azote, 26, 27, 30, 31, 32, 34, 33,3), 41 42, 43, 48, 52, 54, 58, 59, 60, 62, 72-79, 81, 88, 90, 93, 260 ; azotates, 31, 38, 42, 60, 73, 14,077,:01,093;2592%azoûutes 31 760 73; Ji ile

Babouins, 219 (fig.),