INDEX | 
Hrdlicka, Rhodesian man, 154-162 
Spy skeletons, 101 
Huanaco see Guanaco 
Huitzilopochtli, war god of Aztecs, 
339 
Hunting, primitive, 196 
I 
Ice Age, 56-70 
Ichthyosaurs, 16 
Ideographs, 290 
Implement, earliest bone, 135, 185, 
194 
Implements, Acheulian, 188, 189 
Aurignacian, 201, 202 
Aztec, 339 
bone, 135, 185, 193, 194, 201, 
202, 208, 216, 217, 328 
bronze, 269, 270, 304, 320, 342 
Bronze Age, 269 
Chellean, 186 
copper, 269, 304, 339, 342, 344 
farming, 328 
horn, 201, 216 
iron, 306, 324 
ivory, 216, 217 
Magdalenian, 216, 217 
Middle Stone Age, 244 
Mousterian, 192-194 
Neolithic, 258, 259, 261 
obsidian, 194, 339 
Paleolithic, 135, 207-209 
Pre-Chellean, 184, 185 
reindeer antler, 201, 202, 208, 
216 
shell, 328 
wooden, 184, 187, 194, 201, 216 
Solutrean, 207-209 
stone, 135, 180, 184, 186-189, 
192,\593,, 201, 207-209), 210) 
235, 244, 269-271, 297, 328, 
339s 342 
Inca civilization, 340-348 
Empire, 341 
Inca, ruler, 341, 347 
Incas, armies of, 342 
as engineers, 344 
astronomy of, 346 
state socialism of, 341, 342 
India, ancient, 313-317 
Indians see American Indians 
Indo-Europeans, 287, 308 
Industry of Acheulian, 189 
of Aurignacian, 200, 201 
Bronze Age, 269-286 
Chellean, 186, 187 
Egypt, 297 
Magdalenian, 216 
Middle Stone Age, 235-238, 
244 
Mousterian, 94, 97, 99, 115, 
124, 129, 192-195 
Indus Valley civilization, 313 
Infanticide, origin of, 179 
Inhabited worlds, possibility of, 2 
Interglacial stages, 66 
Invertebrates, reign of, 12-14 
Iron Age, 41 
Iron, introduction of, 306 
use of, 315, 324 
Irrigation in New World, 328, 341 
J 
Java, Pithecanthropus found. in, 
146 
Jaw, human lower, 47, 107, 138 
Jeans on solar energy, 4 
Jewelry of Bronze Age, 281 
K 
Kaempfer’s Quarry, human re- 
mains at, 112 
Keith, A., on Ice Age, 68 
on man’s ancestry, 31 
on Piltdown skull, 49, 136 
Klause, human remains at, 75 
‘Knossos, destruction of, 312 
[379] 
