Abstract
IT is a known effect that when a coin is placed on the film side of a photographic plate which rests on a sheet of tin-foil, and the coin and tin-foil are connected to the secondary of an induction coil, an image of the details of the coin is obtained on developing the plate after discharge. The effect appears to be due to the light of a brush discharge from the coin, the intensity of which depends in a somewhat complex way on the contour of the coin, and the distance of its parts from the plate.
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CHESTERS, J. Reproduction of Scales by Electric Discharge to a Photographic Plate. Nature 122, 349 (1928). https://doi.org/10.1038/122349a0
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DOI: https://doi.org/10.1038/122349a0
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