A harvesting machine called a reaper.
Cyrus Mc Cormick invented a mechanical reaper for farmers and obtained patent in 1834.
a reaper
The catapult
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Cyrus Mc Cormick invented a mechanical reaper for farmers. With this he relieved farmers from hours of back breaking laborious work.
E=mc^2
1831
Chicago
The horse drawn reaper.
The mechanical reaper
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Cyrus W. Field invented the first transatlantic telephone cable.