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Keywords from Image Description:
photography physics inventors muybridge smithsonian probably public domain probablypublicdomain SI Neg. . Date na....Title ampquotAcrobat descending....ampquot.Series Neg. No. .An. Loc. Serial No. .Classification ampquotMan Pelvis Cloth.ampquot.Muybridge's cyanotypes are working proofs the contact prints he made from more than negatives