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Warren Thiel ∙
An increase in reform movements
many became involved in reform movement
Americans feared that their jobs would be taken by immigrants who were willing to be paid less for the same job.
There was a successful revolution in the French colony of Haiti
On rivers
Some northern states made slavery against the law.
Gold was discovered there.
A state had the right to choose not to follow a law it thought was unconstitutional.
The cotton gin
california
A machine that removed seeds from cotton (APEX)