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The great importance of a machine for the purpose of detecting very minute quantities of electricity has occurred to many of the cultivators of this science; as by such an assistant not only many chemical combinations or solutions, but also many yet unexplained atmospherical phænomena, may become intelligible.

philosophical transactions of the royal society of london

XXVII. An account of a doubler of electricity, or a machine by which the least conceivable quantity of positive or negative electricity may be continually doubled, till it becomes perceptible by common electrometers, or visible in sparks