America's First Cash Crop was Tobacco. The year was 1614, and the sailing ship Elizabeth was setting off from the young English colony of Jamestown, bound for London with a cargo that included four barrels of tobacco, about 4,000 pounds.
Adobe is an organic and earth material concrete in Spanish areas it is referred as mud brick.
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Explanation:
The Xia dynasty is said to be the first to irrigate, produce cast bronze, and build a strong army. It used oracle bones and had a calendar. Xi Zhong is credited in legend with inventing a wheeled vehicle. He used a compass, square, and rule.
Army Engineers and the Building of the Panama Canal, 1907 - 1914. Lock Construction. A key aspect of the canal plan was the decision to use a series of locks to raise ships above sea level and into a lake upon which they would traverse the Panamanian interior before being lowered again on the other side.