| Henri-Victor Regnault Jean-Baptiste Biot 1851 Calotype 7 7/16 x 5 15/16 ins (18.9 x 15.1 cm) (image and sheet) Philadelphia Museum of Art 125th Anniversary Acquisition. The Lynne and Harold Honickman Gift of the Julien Levy Collection, 2001, Accession Number: 2001-62-585 LL/72115
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