File:Gravitational anisotropy in crystals (IA scientificpapers48219geor).pdf
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[edit]Gravitational anisotropy in crystals
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| Author |
Heyl, P.R. |
| Title |
Gravitational anisotropy in crystals |
| Volume | 19, no. 482 |
| Publisher |
National Bureau of Standards |
| Description |
The present paper sets out the results of experiments in which various crystals were weighed in different axial orientations in the earth's gravitational field. Six crystals were used in all, representing the five nonisotropic crystalline systems. The reason for doing so was to see whether any gravitational anisotropy could be detected, a result which, if found, would contradict Einstein's fundamental postulate in his theory of gravitation, /b viz./ that in effect gravitation and inertia are identical in their nature and indistinguishable. It is here assumed that the inertia of such crystals as were used is independent of axial direction. It was found that, to an accuracy of 1 part in 10/sup 9/, the weights of the crystals were independent of orientation, so supporting Einstein to this extent. A gravity balance by Ruprecht of Vienna was used, and the high accuracy of 1 in 10/sup 9/ was obtained by substituting for the ordinary method of arrest, by raising the beam, a clamping device due to Poynting [Roy. Soc., Proc. 28. pp. 2-35, 1878], but apparently little used. Subjects: |
| Language | English |
| Publication date | 1924 |
| Current location |
IA Collections: NISTresearchlibrary; fedlink; americana |
| Accession number |
scientificpapers48219geor |
| Source | |
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| current | 21:48, 9 September 2020 |  | 979 × 1,435, 40 pages (1.57 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection scientificpapers48219geor (User talk:Fæ/IA books#Fork8) (batch 1000-3000 #229876) |
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