CINEMATOGRAPHY

http://motion.kodak.com/US/en/motion/Hub/history1.htm

Muybridge chalked lines and numbers on a board behind the track to measure progress. As Stanford's horse raced on the track, it tripped the wires and recorded 24 photographs that proved that all four of the horse's feet were off the ground at the same time.
Stanford won his bet, and Muybridge continued experimenting. During the early 1880s, he traveled to Paris to demonstrate his multiple camera system for other photographers and scientists. One of his hosts was Etienne Jules Marey, who was experimenting with the use of a single camera for recording images in motion.