The vitascope is the principal name now in use for moving picture machines. In all these instruments in order that the film projection may be visible to an audience it is necessary to have a very intense light. A source of such light is found in the electric focusing lamp. At or near the focal point of the projecting lantern condenser the film is made to travel across the field as in the kinetoscope. A water cell in front of the condenser absorbs most of the heat and transmits most of the light from the arc lamp, and the small picture thus highly illuminated is protected from injury. A projecting lens of rather short focus throws a large image of each picture on the screen, and the rapid succession of these completes the illusion of life-like motion. Hundreds of patents have been made on cameras, projecting lenses and machines from the days of the kinetoscope to the present time when clear-cut moving pictures portray life so closely and so well as almost to deceive the eye. In fact in many cases the counterfeit is taken for the reality and audiences as much aroused as if they were looking upon a scene of actual life. We can well believe the story of the Irishman, who on seeing the stage villain abduct the young lady, made a rush at the canvas yelling out,--"Let me at the blackguard and I'll murder him." Though but fifteen years old the moving picture industry has sent out its branches into all civilized lands and is giving employment to an army of thousands. It would be hard to tell how many mimic actors and actresses make a living by posing for the camera; their name is legion. Among them are many professionals who receive as good a salary as on the stage. Some of the large concerns both in Europe and America at times employ from one hundred to two hundred hands and even more to illustrate some of the productions. They send their photographers and actors all over the world for settings. Most of the business, however, is done near home. With trapping and other paraphernalia a stage setting can be effected to simulate almost any scene. Almost anything under the sun can be enacted in a moving picture studio, from the drowning of a cat to the hanging of a man; a horse race or fire alarm is not outside the possible and the aviator has been depicted "flying" high in the heavens. The places where the pictures are prepared must be adapted for the purpose. They are called studios and have glass roofs and in most of them a good section of the walls are also glass. The floor space is divided into sections for the setting or staging of different productions, therefore several representations can take place at the same time before the eyes of the cameras. There are "properties" of all kinds from the ragged garments of the beggar to kingly ermine and queenly silks. Paste diamonds sparkle in necklaces, crowns and tiaras, seeming to rival the scintillations of the Kohinoor.