FOOTNOTES
[1] There are still some savage peoples, for instance, the Australians, who continue to make stone implements very similar to those of prehistoric men. Other primitive peoples, such as the natives of the Pacific islands, passed directly from the use of stone to that of iron, after this part of the world was opened up to European trade in the nineteenth century.
[2] Iron was unknown to the inhabitants of North America and South America before the coming of the Europeans. The natives used many stone implements, besides those of copper and bronze. The Indians got most of their copper from the mines in the Lake Superior region, whence it was carried far and wide.
[3] See the illustration, page 45.
[4] See the illustration, page 14.
[5] In the New World, the only important domestic animal was the llama of the Andes. The natives used it as a beast of burden, ate its flesh, and clothed themselves with its wool.
[6] The plants domesticated in the New World were not numerous. The most important were the potato of Peru and Ecuador, Indian corn or maize, tobacco, the tomato, and manioc. From the roots of the latter, the starch called tapioca is derived.
[7] See page 2.
[8] See the illustration, page 14.
[9] Latin cuneus, "a wedge".