Poynting, J. H. (John Henry), 1852-1914, Shakespear, Gilbert Arden, ed, Barlow, Guy, joint ed · Cambridge, University Press · leaf 668
l, that is its weight, the experiment gives the mass ofthe earth in terms of that of the big sphere, and so its mean density. Thisexperiment has often been, repeated, but I do not think it is too much to saythat no advance was made in exactness till we come to quite recent work. By far the most… … Fig. 2. Boys Apparatus. Professor Boys has described his experiment already in this theatre* it isnot necessary for me to do more than refer to it. It is enough to say that hemade the great discovery, obvious perhaps when made, that the sensitiveness ofthe apparatus is increased by reducing its…
Poynting, J. H. (John Henry), 1852-1914 · Physics
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