Cumming, Linnæus, b. 1843. [from old catalog] · New York, D. Van Nostrand · leaf 107
[Book II. expressed, that electricity resides only on the outside of a con-ductor. Let us take an insulated hollow sphere (Fig. 55), or con-ductor of any shape, with a small circular aperture, throughwhich the proof-plane may be easily introduced. Charge theconductor,1 and charge with the same kind… … Fig. 56. Otherwise take an insulated sphere (A), having two in-sulated hemispheres (BC), which envelop A, but are separatedfrom it by an air-space (shown in section in Fig. 56) Let Abe charged, and the hemispheres adjusted carefully without 1 In this and the following experiments the charging of…
Electricity
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