How radium writes its autograph' C35A
documentary heritage
Photograph of an illustration depicting the properties of radium in rock. Printed text on photograph: "HOW RADIUM WRITES ITS AUTOGRAPH. The dark patches of pitchblende in the rock on the left, when placed over a photographic plate in total darkness, were photo-graphed as patches of light, showing that radium rays are emanating from them."
Last Update: 11 May 2023
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235886 (Presto content ID)
PH-1984-1-LS78-3-115 (Reference Number)
C35A (Photographer's number)
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