Eli Whitney
http://mrjohnsonssclasses.wikispaces.com/file/view/eli_whitney2.jpg/213920486/eli_whitney2.jpg
here's an image
http://inventors.about.com/od/cstartinventions/a/cotton_gin.htm
http://www.invent.org/hall_of_fame/152.html
http://web.mit.edu/invent/iow/whitney.html
http://www.archives.gov/education/lessons/cotton-gin-patent/
click on the documents
here are some sites
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