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On the Gravitation Produced by the Earth on Different Substances
Abstract
This is a translation of the celebrated presentation held by Loránd Eötvös at the Hungarian Academy of Sciences on January 20, 1889. Here Eötvös discusses the historical foundations of his claim about the universal equality of inertial and passive-gravitational mass, and gives a survey of his own many-year experimental geophysical studies verifying the equivalence principle with high precision. The famous Eötvös experiment verifying the equivalence principle, first given in this short presentation, was cited many times by Albert Einstein as one of the basics to his General Theory of Relativity. Later the Eötvös experiment became a key point for all following experimental research verifying the equivalence principle, which are still continuing till now, with much increased measuerement precision. This short presentation was originally published in 1890, in the Mathematical and Natural Science Proceedings of Hungary, which were issued in German (the official language of the Austro-Hungarian Empire): Roland von Eötvös. Über die Anziehung der Erde auf verschiedene Substanzen. Mathematische und Naturwissenschaftliche Berichte aus Ungarn, 1890, Bd.8, S.65-68. In this translation we use the original Hungarian transcription of the name of the author instead the German version, Roland von Eötvös, printed in that journal. Translated from the German in 2008 by Larissa Borissova and Dmitri Rabounski. The translators thank Péter Király and Istvánné (Kati) Szalay of the Research Institute for Particle and Nuclear Physics, the Hungarian Academy of Sciences, for assistance with the original Eötvös paper.
Ref: The Abraham Zelmanov Journal, 2008, volume 1, pages 6-9
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The Abraham Zelmanov Journal is an annually issue scientific journal registered with the Royal National Library of Sweden.
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