登入選單

返回Google圖書搜尋

Eli Whitney

Catherine A. Welch

出版	LernerClassroom, 2007-01-01
主題	Juvenile Nonfiction / Biography & Autobiography / Science & Technology
ISBN	08225854489780822585442
URL	http://books.google.com.hk/books?id=VTbuv2YRhYEC&hl=&source=gbs_api
EBook	SAMPLE

註釋

True or false? Eli Whitney invented the cotton gin, a machine for removing seeds from cotton. False! Eli Whitney was the first person to build a wire-toothed cotton gin. But Eli's gin was not the first machine of its kind. He made nails to earn money when he was a boy. He went to court to protect his wire-toothed cotton gin when others tried to build similar machines. He started his own musket-making business.