This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
history of technology historyoftechnology photography physics inventors muybridge smithsonian probably public domain probablypublicdomain SI Neg. . Date na....Title ampquotThree horses on teeter board 'Eagle' 'Minnie' 'Mattie'.ampquot.Series Neg. No. .An. Loc. Serial No. .Classification ampquotHorses.ampquot.Muybridge's cyanotypes