Question

cant find info... What new innovations changed life in the United States between 1776 and 1870

Answer 1

the cotton gin was a big one. eli whitney made it in 1793. it made cotton the number one cash crop in the south.
railroads were starting to be built. the railroad already existed, but it really started to take off. waterways too, man made canals. all the the machines that were run by horse power were switched over to water power.
there was the industrial revolution which i kind of gave examples of above.

Answer 2

Thanks, but I need know when they came out though... Like when the cotton gin came out

Answer 3

cotton gin was created 1793.
railroads were around 1770's when the iron bars were being laid down. the first steam engine came from england in 1753.
industrial revolution started about 1760 and lasted all the way until 1820-1840.