-Cyrus McCormick's reaping machine of 1831 (patented 1834). Exhibited at Crystal Palace Exhibition of 1851. First widely adopted reaping machine.
purpose of invention
-For farmers in the early 19th century, harvesting required a large number of labourers, and, if they could be found, the cost of hiring them was high.
how dose it work?
when and where the invention first occur
what is the need and why is it imortant in history?
Cyrus McCormick's Reaping Machine Of 1831 (patented 1834). Exhibited At Crystal Palace Exhibition Of 1851. First Widely Adopted Reaping Machine. Hand-coloured Engraving.. Photography. Encyclopædia Britannica ImageQuest. Web. 3 Feb 2014. http://quest.eb.com/images/300_2285422
McCormick, Cyrus . Photograph. Encyclopædia Britannica. Web. 3 Feb. 2014. <http://school.eb.com/levels/high/article/49662/media?assemblyId=12905>.
Reuben Gold Thwaites, Cyrus Hall McCormick and the Reaper (1909); Herbert N. Casson, Cyrus Hall McCormick: His Life and Work (1909, reprinted 1971); Cyrus McCormick, The Century of the Reaper (1931, reprinted 1972).