American industry first used machines to do work previously done by hand is letter D which is cotton farming. Cotton has been in American industry since 1500's documented from sightings by the Coronado expedition 1540-42. White Gold is the appropriate term for cotton, <span>the natural fiber which continues to play an important role in the United States economy.</span>
The diseases brought to this continent by the Europeans included bubonic plague, chicken pox, pneumonic plague, cholera, diphtheria, influenza, measles, scarlet fever, smallpox, typhus, tuberculosis, and whooping cough
