PART ONE: First Things First: Beginnings in History, to 500 B

What new inventions are the Chinese credited for? Abacus, compass, gunpowder. Where did corn, potatoes, and tomatoes come from? Where did wheat come from? Corn, potatoes, tomatoes-New World, wheat-Old World. Why did the colonists run into problems with their original labor source? Who did they turn to replace the labor source? ................
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