History of Science Museum: Collection Database Search


Exhibition Label 2005

PHOTOGENIC DRAWING by Sir John F. W. Herschel, October 13, 1839 - contact print of an engraving (by John Cochran, about 1830), a hypo-fixed silver negative made either as a demonstration of the perfection of the hypo method, or as a negative for further experi-ments in making positives by different chemicals

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