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
0822585448
9780822585442
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.