| Eadweard Muybridge The Zoopraxiscope: 1. Athlete, Horse-Back Somersault 1893 Book illustration University of Pennsylvania - University Archives and Records Center LL/36815 Eadweard Muybridge "Descriptive Zoopraxography or the Science of Animal Locomotion made popular" (University of Pennsylvania: Bureau of Education at the World's Columbian Exposition, in Zoopraxographical Hall, 1893)
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