In 1793, Eli Whitney invented a simple machine that influenced the history of the United States. He invented a cotton gin that was popular in the South. The South became the cotton producing part of the country because Whitneys cotton gin was able to successfully pull out the seeds from the cotton bolls.
Eli Whitney was born in Westboro, Massachusetts on December 8, 1765 and died on January 8, 1825. As a young boy he liked to work in his fathers workshop taking things apart, like clocks, and putting them back together again. When he was a young man, he worked on a Georgian plantation tutoring children. He noticed the trouble the slaves were having picking seed from cotton bolls. In his spare time, he put together an instrument that would allow the slaves to clean more cotton in a shorter amount of time.
The cotton gin was a very simple invention. First, the cotton bolls were put into the top of the machine. Next, you turn the handle, which turns the cotton through the wire teeth that combs out the seeds. Then the cotton is pulled out of the wire teeth and out of the cotton gin.
Farmers were able to plant more cotton. Cotton is easy to grow but because it was so difficult to clean, cotton was not a cash crop. Tobacco and indigo were the Souths cash crops. Tobacco is difficult to grow. Tobacco wears out the land and the land must be given a rest once every 7 years. But cotton can grow anywhere, even on land that is drained of its nutrients.
Now that cotton is easier to clean and since it grows easily, cotton became the number one cash crop in the South. The farmers needed more land to grow cotton. They took the land from the Native Americans. The farmers needed more workers. Slaves were the free labor that the farmers needed to harvest the cotton.
This growth of cotton production affected the world. The Northern part of the United States bought more cotton and built more textile mills. England built more textile mills and demanded much more cotton. These were two big markets to which the South sold their cotton. The South was not able to build textile mills because their capital was tied up in their slaves so that they could produce more cotton. The South also did not have the need or the capital to build up a good transportation system, such as canals and railroads.
During the Civil War, the South had many disadvantages over the North. A large portion of their population were uneducated slaves. They had no factories to produce goods and to become self sufficient when they separated from the North. Because the South had not built up a good transportation system, they were not able to move men and supplies easily across the country, as the North was able to do.
By 1860, cotton was a cash crop. Cotton production in the South had increased. The number of slaves in the United States had increased. The dependency on slaves had increased. Capital had been invested in slaves, not in transportation or factories. All this happened because of a very simple machine, the cotton gin.
Explain what life was like in the South without the cotton gin and changes after the cotton gin. Have students identify on a map the cotton-producing states (North Carolina, South Carolina, Georgia, Alabama, Mississippi, Louisiana, Arkansas, Texas, Tennessee)
With a partner or working alone, have students create an invention. They should make a diagram, explain how it works, and the effects it will have on society. They can file a patent application by including these three items: a clearly handwritten or typed document that describes the invention and includes which parts of the invention are unique and useful, and a signed and officially witnessed oath that you are the original and first inventor, technical drawings that show how the invention is made and how it works. If students have a difficult time writing directions, they can draw pictures sequencing the motions to use their invention and then they can use the pictures to write their sentences.