115095-01
Expériences pour déterminer la densité de la Terre. Traduit de l'Anglais par N. M. Chompré.
(Paris, Ca. 1815). - (26,5 x 21 cm). SS. 263-320. Mit 2 gefalteten Kupfertafeln. Moderner Pappband im Stil der Zeit. (Aus: Journal de l'Ecole polytechnique).
Erste französische Ausgabe der bedeutenden, 1798 in den Philosophical Transactions erstmals erschienenen Arbeit. - "Cavendish published five papers between 1784 and 1809 relating to his astronomical interests. With one exception they were comparatively minor productions... The exception was his determination of the density of the earth (or weighing of the world) in 1798, by means of John Michell's torsion balance. The apparatus consisted of two lead balls on either end of a suspended beam; these movable balls were attracted by a pair of stationary lead balls. Cavendish calculated the force of attraction between the balls from the observed period of oscillation of the balance and deduced the density of the earth from the force. He found it to be 5.48 times that of water. Cavendish was the first to observe gravitational motions induced by comparatively minute portions of ordinary matter. The attractions that he measured were unprecedentedly small, being only 1/500,000,000 times as great as the weight of the bodies. By weighing the world he rendered the law of gravitation complete. The law was no longer a proportionality statement but a quantitatively exact one; this was the most important addition to the science of gravitation since Newton" (DSB). - Stellenweise mit leichtem Wasserrand, die Tafeln etwas stärker, sonst gut erhalten. - DSB 3, 155; vgl. Norman 422 (engl. EA)
Expériences pour déterminer la densité de la Terre. Traduit de l'Anglais par N. M. Chompré.
(Paris, Ca. 1815). - (26,5 x 21 cm). SS. 263-320. Mit 2 gefalteten Kupfertafeln. Moderner Pappband im Stil der Zeit. (Aus: Journal de l'Ecole polytechnique).
Erste französische Ausgabe der bedeutenden, 1798 in den Philosophical Transactions erstmals erschienenen Arbeit. - "Cavendish published five papers between 1784 and 1809 relating to his astronomical interests. With one exception they were comparatively minor productions... The exception was his determination of the density of the earth (or weighing of the world) in 1798, by means of John Michell's torsion balance. The apparatus consisted of two lead balls on either end of a suspended beam; these movable balls were attracted by a pair of stationary lead balls. Cavendish calculated the force of attraction between the balls from the observed period of oscillation of the balance and deduced the density of the earth from the force. He found it to be 5.48 times that of water. Cavendish was the first to observe gravitational motions induced by comparatively minute portions of ordinary matter. The attractions that he measured were unprecedentedly small, being only 1/500,000,000 times as great as the weight of the bodies. By weighing the world he rendered the law of gravitation complete. The law was no longer a proportionality statement but a quantitatively exact one; this was the most important addition to the science of gravitation since Newton" (DSB). - Stellenweise mit leichtem Wasserrand, die Tafeln etwas stärker, sonst gut erhalten. - DSB 3, 155; vgl. Norman 422 (engl. EA)
1.500 €