Photograph of the apparatus constructed by experimental photographer Eadwaerd Muybridge in order to capture former California Governor Leland Stanford's horse while in motion, Palo Alto, ca.1872-1878. Two men at left attend to a track situated next to a long wall, while others attend to subsequent tracks and a shed inscribed with the numbers 1 through 24 to the right. A box supported by carpenter's benches stands in the right foreground. Trees are visible in the background.; "The components required during the process included twelve cameras, equipped with 'fast' stereo lenses and an electrically-controlled mechanism to operate the cameras' special shutters. Wires laid underground along the track at 21-inch intervals released the shutter of each camera as the wheels of the sulky made contact. The twelve pictures -- taken in about half a second -- were the result of Muybridge's long work designing and assembling the equipment used (in conjunction with a group of scientists & engineers) and formulating the vital chemical recipe to develop clear photographs of fast movement." -- from the California Museum of Photography homepage, http://photo.ucr.edu/photographers/muybridge/default.html.