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In 1798 Eli Whitney came up with interchangeable parts made for practical purposes and it was also made for identical machine parts for a tool or an instrument.

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The 1800s entire cities began to emerge factories, one factory spun thread and wove it into cloth. Poor women had to go out and work wealthy families women stayed home 12 hours a day and 6 days a week and worked long hours all year round. Theaters,museums, and circuses. Dirt and gravel rounds turned into mud holes.

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The Spinning Jenny could spin only one thread at a time. In 1764 James Hargreaves developed the spinning Jenny, a machine that could spin several threads at once.

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The Mills were made in the 1800s and they were made by Samuel Slater they were made to cut wood and it was also made by Moses Brown as well they revolutionized the way things are made today.

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In 1824 John Deer made the Iron plow the Steel plow it was made to plow fields at a quicker pace.

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The telegraph was made in 1837 by Samuel B Morris it was made to send information by making and breaking and electrical connection.

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It was created by Cyrus Mccormick it was a machine that originally used a horse to cut and gather wheat and other grains the reaper can do the work of the 5 men using hand tools.

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Industries increased cities sprang up factories and people were attracted to job opportunities, 15 percent of nations population lived in cities, but soon then the sewage polluted water and streets turned into mud holes when it rained and the untreated sewage went to wells into streets.

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Women/Lowell girls they moved from farms to mill towns to work in factories,they got paid low wages to send back home to families, children were used to fit in small spaces around large machines to change spindles.

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The mechanical drill was made in 1889 by Arthur James Arnot and William Blanch Brain of Melbourne it is made to create multiple holes in different materials such as wood,metal,plastic, ect.