Poynting, J. H. (John Henry), 1852-1914, Shakespear, Gilbert Arden, ed, Barlow, Guy, joint ed · Cambridge, University Press · leaf 677
nsider the possibihty of the quadrantal couple only. Our mode of working will be seen from Fig. 9. The hanging sphere,■9 cm. in diameter and 1 gm. in weight, was placed in a light aluminium wirecage with a mirror on it, and suspended by a long quartz fibre in a brasscase with a window in it… … Pkrvocb 1-Z5 Fig. 10. Upper curve a regular vibration. Lower curve a disturbance dying away. A larger quartz sphere 6-6 cm. diameter and weighing 400 gms., wasfixed at the lower end of an axis which could be turned at any desired rateby a regulated motor. The centres of the spheres were on the same…
Poynting, J. H. (John Henry), 1852-1914 · Physics
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