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BULLEN (K. E.).-
The Earth's Density.
London, Chapman and Hall, 1975, grand in 8° relié plein skivertex vert de l'éditeur, XIII-420 pages.
Reference : 68230
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Librairie ancienne le Bouquiniste Cumer-Fantin
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5 book(s) with the same title
Account of Pendulum Experiments undertaken in the Harton Colliery, for the purpose of determining the Mean Density of the Earth. Received December 26, 1855, - Read January 24 and 31, 1856. (+) Supplement to the ""Account of Pendulum Experiments...."" "" ...
(London, Taylor and Francis, 1856). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1856 - Vol. 146 - Part I. Pp. 297-342 a. pp. 343-355. Clean and fine.
First printing of the paper in which Airy describes his remarkable experiments aiming at finding the density of the earth. His approach to the problem was to determine the differences of gravity at the top as well at the bottom of a suitable deep mine.""One of the most remarkable of Airy's researches was his determination of the mean density of the Earth. In 1826, the idea occurred to him of attacking this problem by means of pendulum experiments at the top and bottom of a deep mine. His first attempt, made in the same year, at the Dolcoath mine in Cornwall, failed in consequence of an accident to one of the pendulums. A second attempt in 1828 was defeated by a flooding of the mine, and many years elapsed before another opportunity presented itself. The experiments eventually took place at the Harton pit near South Shields in 1854. Their immediate result was to show that gravity at the bottom of the mine exceeded that at the top by 1/19286 of its amount, the depth being 383 m (1,256 ft) From this he was led to the final value of Earth's specific density of 6.566.[This value, although considerably in excess of that previously found by different methods, was held by Airy, from the care and completeness with which the observations were carried out and discussed, to be ""entitled to compete with the others on, at least, equal terms."" (The currently accepted value for Earth's density is 5.5153 g/cm.). (Wikipedia).
"CAVENDISH, HENRY. - WEIGHING THE WORLD - THE MOST IMPORTENT ADDITION TO GRAVITATION THEORY SINCE NEWTON.
Reference : 43865
(1799)
Versuche über die Dichtigkeit der Erde zu Bestimmen. Erläutert vom Herausgegeber (Gilbert). (Experiments to determine the Density of the Earth.).
Halle, Rengerschen Buchhandlung, 1799. Without wrappers. In ""Annalen der Physik. Herausgegeben von Ludwig Wilhelm Gilbert"", Bd. 2, Erstes Stück. (The entire issue offered). Titlepage to vol. 2. Pp. 1-118 a. 2 folded engraved plates. Cavendish's paper: pp. 1-62. (the torsion balance of Michell shown on the plates).
First German edition of Cavendish's famous paper in which he calculated the weight of the earth and determined its mass. He also, as the first, observed gravitational motion of minute portions of matter. He estimates the earth's mass to 6,6 x 10 to the potential of 24 kg. The original paper ""Experiments to determine the Density of the Earth"" appeared in Philosophical Transaction, 1798.""Cavendish published five papers between 1784 and 1809...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 the force of attraction between the balls fro 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...By weighing the world he rendered the law of gravitation complete. The law was no longer a proportionally statement but a quantitatively exact one" this was the most importent addition to the science of gravitation since Newton.""(DSB III, p. 158.).
"CAVENDISH, HENRY. - WEIGHING THE WORLD - THE MOST IMPORTENT ADDITION TO GRAVITATION THEORY SINCE NEWTON.
Reference : 48206
(1799)
Versuche über die Dichtigkeit der Erde zu Bestimmen. Erläutert vom Herausgegeber (Gilbert). (Experiments to determine the Density of the Earth.).
(Halle, Rengerschen Buchhandlung, 1799). Without wrappers. In ""Annalen der Physik. Herausgegeben von Ludwig Wilhelm Gilbert"", Bd. 2, Erstes Stück. (The entire issue offered). 1-118 a. 2 folded engraved plates. Cavendish's paper: pp. 1-62. (the torsion balance of Michell shown on the plates).
First German edition of Cavendish's famous paper in which he calculated the weight of the earth and determined its mass. He also, as the first, observed gravitational motion of minute portions of matter. He estimates the earth's mass to 6,6 x 10 to the potential of 24 kg. The original paper ""Experiments to determine the Density of the Earth"" appeared in Philosophical Transaction, 1798.""Cavendish published five papers between 1784 and 1809...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 the force of attraction between the balls fro 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...By weighing the world he rendered the law of gravitation complete. The law was no longer a proportionally statement but a quantitatively exact one" this was the most importent addition to the science of gravitation since Newton.""(DSB III, p. 158.).The issue contains further papers by Ritter, Chladni et al.
On a Determination of the Mean Density of the Earth and the Gravitation Constant by means of the Common Balance. Received May 13, - Read June 4, 1891.
(London, Harrison and Sons, 1892). 4to. No wrappers as extracted from ""Philosophical Transactions"", 1891, Vol. 182 - Series A. Pp. 565-656 a. 7 lithographed plates.
First appearance of this importent paper for which Poynting was awarded the Adams Prize of Cambridge.""These days John Henry Poynting is best known for his association with the Poynting vector, which describes the flow of energy in an electromagnetic field, and little is known of his life or work. Yet in the 1890s he caught the popular imagination as the man who weighed the Earth'. His experiment, using a novel method with a common balance, was part of a heroic tradition, gained him Cambridge University's Adams Prize, and set new standards of precision. Yet in performing this experiment, Poynting seemed to step outside the traditions of late nineteenth century Cambridge University where he was educated, and it is probably significant that he was a Unitarian throughout his life.""(Isobel Falconer)..
Account of Pendulum Experiments undertaken in the Harton Colliery, for the purpose of determining the Mean Density of the Earth [suivi de] Supplement to the "Account" being an Account of Experiments undertaken to determine the Correction for the Temperatu
[London, Philosophical Transactions, 1856], in-4, 2 parties en 1 vol. , de 297 à 355pp, 1pl, demi-chagrin bordeaux. (Rel. mod.), Planche h.t. gravée sur métal représentant le pendule décrit dans ce mémoire. George Biddell Airy (1801-1892) fut directeur de l'Observatoire de Greenwich de 1835 à 1886. (cf. DSB, I, pp. 84 et suiv.) Couverture rigide
Bon 2 parties en 1 vol. , de 297
