Effects of Electrical Discharge on Photographic Plates

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Abstract

IN your issue of January 21, you published a note of mine on certain effects produced by charged conductors on sensitive plates. In the case of the radiograph of wire skeletons, I find that this is not an electrical effect, but is, in accordance with my alternative suggestion, undoubtedly due to the unequal loading of the film with silver particles, which set themselves in the pattern shown in the illustration when the gelatine is raised to a temperature near its melting point.

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