Eadweard James Muybridge (1830 – 1904) was an English photographer important for his pioneering work in photographic studies of motion and in motion-picture projection. He created the first ‘movie projector’ – the Zoopraxiscope
Muybridge used his techniques of photographic motion to settle a popular dispute about whether horses galloped with all four hooves off the ground – something that could not be perceived by the human eye.
The study is called Sallie Gardner at a Gallop or The Horse in Motion; it shows images of the horse with all feet off the ground. This did not take place when the horse’s legs were extended to the front and back, as imagined by contemporary illustrators, but when its legs were collected beneath its body as it switched from “pulling” with the front legs to “pushing” with the back legs.