| Hermann Krone Collodium, 1856 - 58. [Didactic panels, Historisches Lehrmuseum für Photographie - Tafel 22] 1896 (after) Didactic panel Institut für Angewandte Photophysik - Institute of Applied Photophysics LL/47573 One of a series of 141 didactic panels (German) created by Krone containing 1,100 photographs which outline the history of photography upto 1896.
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