248
Arabic figures, 257
Arabic language, 243
Arabs, 253 et seq., 294; culture of, 267
Arbela, battle of, 147, 431
Arcadius, 230, 431
Archangel, 419
Archimedes, 151
Ardashir I, 241, 430
Argentine Republic, 396
Arians, 224
Aristocracy, 130
Aristotle, 142, 144, 146, 256, 282,