Muybridge placed twenty-four cameras along the rail of the California race-track, where the attempt was to be made. Strings were stretched across the track from each of the cameras and adjusted so that when the running horse broke them it would operate the shutter in such a manner that each camera secured a photograph of the animal. Muybridge’s success received world-wide notice and set the scientists of Europe and America to renewed efforts to perfect the motion-picture idea. Some progress was made in the decade immediately following, the French worker, Dr. Marey, being especially successful. But for many reasons Muybridge’s methods, and those of his followers, were not fitted to practical use. These faults all found their basis in the necessity of using cumbersome glass plates in making the photographs, so the search began for a flexible substance on which pictures could be taken. Gelatine was utilized in many different ways, with little success; preparations of all sorts were tried on paper. Our own Edison was working on the problem in the early eighties, and made many important discoveries regarding pictures, but they were not to see practical application until the invention of celluloid film. History, in this case found in dusty court records, awards the priority of patent on the process of making motion-picture film to the Rev. Hannibal Goodwin, of Newark, New Jersey. In the years between 1885 and 1887 the clergyman, working independently, and George Eastman, experimenting with his co-worker, Walker, evolved a flexible film of which celluloid was the basis. Eastman’s company began the manufacture of the film on a large scale, and waxed strong, while Goodwin, and later his heirs, were forced to a court battle that did not end until 1914, when a final decision was given in favor of the owners of the Goodwin patents. At present the Eastman Company manufactures practically all of the world’s film supply under an arrangement with the holders of the Newark clergyman’s patents.