_Hittite Inscriptions._ Cornell Expedition, Ithaca, New York, 1911. _El libro statistico de la republica argentina._ Dirección géneral de comercio e industria. Talleres gráficos del ministerio de agricultura, Buenos Aires, 1905. _Schaff-Herzog Religious Encyclopedia._ _Secret History, or The Horrors of Santo Domingo, in a series of Letters Written by a Lady at Cape François to Colonel Burr (late Vice-President of the United States) principally during the Command of General Rochambeau._ Philadelphia, Bradford and Inskeep, R. Carr, printer, 1808. _The Statesman’s Yearbook for 1915._ London, Macmillan. _Statisk Arsbok for Finland, 1917._ Helsingfors, 1918. _The Statistical Yearbook of the Argentine Republic_, 1915. INDEX Aachen, 182. Accad, 147; language of, 239. Achæans, 158–161, 173, 189, 223, 225, 243, 253; at Troy, 159; invade Greece, 158–159; language of, 161. Acheulean period, 104–106, 133. Achilles, 159. Actinic rays, 38, 84. Adamic theory, 13. Adriatic, 36, 138. Ægean, islands of, Hellenes in, 162; Ægean region, Nordics in, 253. Æolian language, 243. Æolians, 159. Afghan hill tribes, physical character of, 261; language, 261; passes, Nordics in, 257, 259. Afghanistan, 257, 261; Mediterranean race in, 148; physical types of, 257. Afghans, 148; language of, 148. Africa, 23, 33, 82; Alpines in, 140, 158; Bronze Age in, 128; cephalic index in, 23; hunting tribes of, 113; Mediterraneans in, 148, 151, 152, 155; megaliths in, 155; Negro population of, 33, 79, 80; no Nordic blood in, 180, 223; Nordic invasion of, 223; North Africa, as part of Europe, 152; Berbers of, 152; under Vandals, 180, 233; _South Africa_, density of native population barrier to white conquest, 79, 80. Agglutinative languages, 148, 234, 239, 240. Agriculture, 112, 122–124, 138, 146, 240. Ainus, physical characters of, 224–225; crossed with Mongols, 225. Alabama, 99. Alani, or Alans, 66, 177, 195. Alaska, 45. Albania, 30, 36, 164; stature in, 190. Albanian language, 164; origin of, 243–244; Albanian type, 164. Albanians, 25; blondness of, 163; in the Balkan peninsula, 153. Albigensians, 157. Albinos, 25. Alcoholism, 55. Alemanni, 135, 145, 177. Alexander the Great, 161–162, 256, 259. Alexandria, 92. Algeria, 44. Alphabet, earliest traces of, 115.