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Sir, Being employed in some electrical enquiries about the beginning of the year 1762, it occurred to me, that many experiments on this subject might be made with a much greater degree of precision, if we could determine, with any tolerable accuracy, the comparative quantity of electric fluid, with which, for any given experiment, the coated phial is impregnated.

philosophical transactions of the royal society of london

XLIV. Description of an electrometer invented by Mr. Lane; with an account of some experiments made by him with it: In a letter to Benjamin Franklin, LL. D. F. R. S.