The Description of a Sector, for Giving the Proportionable Sizes of Wheels and Pinions; And for Determining the Proper Distance of Their Centers from Each Other. ... Made and Considerably Improved by R. Pennington. by Robert Pennington (Paperback / softback, 2010)

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The 18th century was a wealth of knowledge, exploration and rapidly growing technology and expanding record-keeping made possible by advances in the printing press. Books on science and technology, agriculture, military technology, natural philosophy, even cookbooks, are all contained here.