More factories soon sprang up in the North. This proved to be a huge advantage for the Northerners later during the Civil War.
cotton gin was invented by Eli Whitney.
Whitney was also called the "Father of Mass Production" for his method of producing guns. Previously, only skilled craftsmen made muskets one at a time. Whitney made it possible for even unskilled workers to assemble many muskets, using uniform parts.
James Watt's improved steam engine. The steam engine allowed factories to be built anywhere, not just beside swiftly flowing streams where they used to need the waterpower for their factories.
1834, Cyrus McCormick's reaper
1807, Robert Fulton's steamboat, the Clermont
The Erie Canal
1825, The Erie Canal
Laying track for railroads
1836, Samuel Morse invented the telegraph
See this Want Ad for the Pony Express.