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A Treatise of Mathematical Instruments, including most of the instruments employed in Drawing; for assisting the vision; in Surveying and Levelling, in practical Astronomy and for measuring the Angles of Crystals

出版	John Weale, 1849
URL	http://books.google.com.hk/books?id=CBVbAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN