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TRAITE DE MECANIQUE ou l'on explique tout ce qui est necessaire dans la pratique des Arts, & les proprietes des corps pesants lesquelles ont un plus grand usage dans la Physique.
Paris, de l'Imprimerie Royale, et se vend chez Jean Anisson, 1695.. FIRST EDITION 1695, French text. 12mo, approximately 170 x 100 mm, 6¾ x 4 inches, numerous diagrams and a few illustrations in the text, pages: (12), 492, bound in full old mottled leather, raised bands, gilt lettering and gilt decoration in compartments to spine. Spine worn with 10 mm (½ inch) amateur repair at head and 5 mm (¼ inch) amateur repair at tail, upper hinge cracked and holding on the cords, lower hinge starting to crack at head, corners worn, many pages lightly age-browned, occasional dark spot, no loss of text, small hole in 1 margin, 1 margin with 2 short closed tears and a small chip, 1 corner tip torn off. Textblock tight and firm, a good copy. Philippe de la Hire (1640 - 1718) was a French mathematician who was best known for his work on conic sections, geodesy and astronomy. He was elected to the Académie Royale des Sciences in 1678 and in 1683 he was appointed to the chair of mathematics at the College Royale. Four years later he was appointed, in addition, to the chair of architecture at the Academie Royale. Geometry which he had studied during 4 years in Italy was a special interest of his. "This work marks a significant step toward the elaboration of a modern manual of practical mechanics, suitable for engineers of various disciplines... he furnished useful descriptions and put forth the suggestion of adopting an epicycloidal profile for gear wheels." DSB 7, 578. "Pages 231-237 are devoted to finding the correct form to be given to the fusee in spring clocks. The form is found geometrically on the assumption that the force of the spring is proportional to the angular movement of the barrel." Baillie, Clocks and Watches, page 122. MORE IMAGES ATTACHED TO THIS LISTING, ALL ZOOMABLE. FURTHER IMAGES ON REQUEST. POSTAGE AT COST.
      [Bookseller: Roger Middleton]
Last Found On: 2017-06-22           Check availability:      IOBABooks    

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