Eadweard Muybridge, an English photographer, was born Apr. 9, 1830. Muybridge journeyed to the American West in 1867 and took photographs of such places as Yosemite. His work came to the attention of Leland Stanford, California businessman and avid racehorse breeder, who had an obsession: he wanted to know whether a horse, when it ran, ever had all four legs off the ground, as often portrayed by painters. In 1872, Stanford engaged the services of Muybridge, who set up a series of 24 cameras and was able to take multiple shots of the running habits of Stanford's various racehorses, in a kind of film-strip style. The photographs demonstrated that all four legs often left the ground, although not as artists had depicted them, with the legs stretched out fore and aft, but rather with the four legs tucked up under the horse. Stanford was so pleased that he engaged a writer, J.D.B. Stillman, to compile a book, The Horse in Motion, which was published in 1882, and which shows many of Muybridge's film-strips of assorted walking, trotting, and galloping horses.
He placed numerous large glass-plate cameras in a line along the edge of the track; the shutter of each was triggered by a thread as the horse passed (in later studies he used a clockwork device to set off the shutters and capture the images).
The Horse in Motion is a beautiful large quarto, with jumping horses embossed in gold on the dark green cloth of the binding; we have a copy in the History of Science Collection. One contributing factor in the long delay in the publication of the book was no doubt Muybridge's trial for murder after he shot and killed his wife's lover in 1874. The act was ruled "justifiable homicide."
Muybridge is also known for his his zoopraxiscope, a device for projecting motion pictures that pre-dated the flexible perforated film strip used in cinematography. It may be considered the first movie projector. The zoopraxiscope projected images from rotating glass disks in rapid succession to give the impression of motion. The stop-motion images were initially painted onto the glass, as silhouettes. A second series of discs, made in 1892–1894, used outline drawings printed onto the discs photographically, then colored by hand. Some of the animated images are highly complex, featuring multiple combinations of sequences of animal and human movement.
http://philosophyofscienceportal.blogspot.com/2010/04/eadweard-muybridges-horse-in-motion.html
https://commons.wikimedia.org/wiki/File:A_man_standing_on_his_hands_from_a_lying_down_position._Photogravure_after_Eadweard_Muybridge,_1887_-_V0048688.jpg
https://en.wikipedia.org/wiki/Zoopraxiscope
http://designhistorylab.com/sp2010dhl/moser/Website/html/Zoopraxiscope.html
http://www.warrenphotographic.co.uk/04315-ginger-cat-bounding-multiple-exposure
http://www.nytimes.com/2012/04/08/arts/music/breaking-conductors-down-by-gesture-and-body-part.html