Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 479
her words, one terminalbecomes positively charged, and the other negatively charged. If, therefore, either terminal be connected with an insulated metallicplate, such, for example, as one of the plates of an ^pinus condenser,and a pith ball be hung before the plate in the position shown in Fig.3,… … Fig. 4.—The Dolbear Electro-Static Receiver. plate E, were connected with the other terminal of the secondary coiLIf, in place of the pith ball, another plate be placed near E, but notin electrical contact with it, and one of the plates be connected withone of the free terminals of the secondary…
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