Audiovisual introductions in 1867

thumb|The Horse in Motion, a motion study photographed by Eadweard Muybridge using chronophotography, 1878 thumb|Animated gif from frame 1 to 11 of The Horse in Motion. "Sallie Gardner", owned by Leland Stanford, running at a 1:40 pace over the Palo Alto track, 19 June 1878.