登入選單

返回Google圖書搜尋

Timekeepers at Sea

Geraldine Norman

出版	Times Newspapers, 1981
URL	http://books.google.com.hk/books?id=u3C8nQEACAAJ&hl=&source=gbs_api

註釋

Suggests that John Arnold misappropriated Thomas Earnshaw's invention, the 'Earnshaw escapement'.