All About Inventions and Discoveries
The Romance of modern scientific and mechanical Achievements

328 All About Inventions through the vertical slits of a horizontal drum upon the white inner surface of which grotesque figures in different positions are printed, ever wonders at the appearance of movement which is imparted to the pictures when the drum is rapidly revolved. But there is one outstanding feature which must be borne in mind in connection with Heyl’s achieve- ment. His series of pictures were taken from one point of view, as they are to-day. This is the out- standing difference between what he did and that of the next man who gave a decisive impetus to animated photography, and whose name is the most prominent in connection with these early efforts. Muybridge, the experimenter in question, set up a series of cameras in a long line at predetermined distances, the shutter of each of which was actuated as the moving subject passed. Muybridge embarked upon his experiments with a view to elucidating pictorially certain debatable points in connection with the movements of animals. He did not aspire to their projection, as did Heyl, so much as the study of successive photographic prints. Subsequently, however, he did prepare glass positives or slides for projection upon the screen, the apparatus he designed to consummate this end being somewhat similar in its broad principles to that evolved by Heyl, and to which Muybridge gave the name “Zoöpraxiscope.” While Muybridge was concerned with these later experiments another American inventor, Thomas Alva Edison, was perfecting an appliance for photographic- ally portraying life-like movements, and it made its appearance in 1889. The apparatus, which was christened the “ Kinetoscope,” recalled in its general