How do the number of free african americans and the number of slaves compare from 1790 to 1860?

1. What did Eli Whitney use to demonstrate interchangeable parts to President John Adams?
2. Where did the industrial revolution actually start?
3. What two events/factors helped “spark“ the industrial revolution in the United States?
4. How did manufacturing develop in New England
5. How were the agriculture systems of the north and south different
6. About how many African American slaves were in the United States in 1860 ?
7. How do the number of free African Americans and the number of slaves compare from 1790 to 1860 ?
8. How were the agricultural systems of the North and South different?
9. Were roads or canals a more powerful factor in unifying the United States in the first half of the 1800 's?
10. Which region had the heaviest concentration of roads, canals, and railroads? WHY?

How have African Americans played a central part in American History?

What were some of the important groups for the african americans during the progressive reformers?