EMERSON (W.).

The Laws of Centripetal and Centrifugal Force. Shewing, the Motion of Bodies in Circular Orbits, and en the Conic Sections, and other Curves. And explaining the perturbating Force of a third Body. With many other Things of like Nature. Being a Work preparatory to Astronomy and the very Basis thereof. And absolutely necessary to be known by all such as desire to be Profocients in that Science.

S.l.n.d. (c. 1769). in-8. 1f. II. 81pp. 1f. 6 planches dépliantes hors-texte. Demi basane, dos lisse orné (Reliure de l'époque usagée, manques au dos). Edition Originale illustrée de 6 planches dépliantes. "(This work) is a text preparatory to the study of astronomy and deals with the motion of bodies in circular orbits and other curves, with a considerations of the influencing force of other bodies. In it Emerson seeks to explain apparent irregularities in the motion of celestial bodies" (Bibliotheca Mechanica) Le mathématicien anglais William Emerson (1701-1782) était un amateur excentrique qui vivait reclus et très pauvrement pour se consacrer à l'étude des mathématiques, de l'astronomie, de la physique et de la médecine. "He was widely known and his books highly esteemed" (Taylor). Taches de mouillures marginales à plusieurs feuillets, les angles inférieurs des plats ont été affaiblis par l'humidité. Taylor, The Mathematical practitionners of Hanoverian England, p. 157

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• librero: Llibreria Antiquària Comellas (SPAIN)