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A Treatise on a mathematical and mechanical invention for Chimney-sweeping, with a disquisition on the different forms of chimnies, and shewing how to cure smoky ones

George ORR

出版	J. Ginger, 1803
URL	http://books.google.com.hk/books?id=Ib9bAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN