Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 110
Fig. 59. 100 ELECTRICITY [CH. VI The motion of the spot is parallel to the axis of the drum,at right angles therefore to the motion of the paper. The trace of the spot when developed forms a continuouscurve, which gives the variations of the potential. Such acurve obtained at the National Physical… … Fig. 60. In another arrangement due also to Lord Kelvin thenecessary stream of particles isafforded by the smoke from a slow-burning match; the match is heldin an insulating handle and con-nected to the electrometer, and thepotential measured by reading theinstrument. The portable electro-meter…
Electricity · Magnetism
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