The Kinetograph is the latest reported invention of Mr. Thomas Edison. In an interview published in the _New York Sun_, Mr. Edison described this still unperfected machine as an instrument with which he photographs a man or a company of men in action at the rate of 46 per second. The negatives are one-half inch square, taken on a continuous film of gelatine of any length desired. By an ingenious arrangement the images from the gelatine ribbon are later thrown upon a screen and this ribbon is made to move at a rate corresponding to the original rate of action, and at the same time a phonograph is made to repeat the words of the speaker represented. To thus photograph a 30-minute act of an opera, for example, a ribbon 6,400 feet long would be required, each photograph one-half inch square and requiring an inch of linear space. The commercial sphere of the Kinetograph has not yet been defined. That last observation was very true for the time being. In late May of 1891 an indifferent account of the device was cabled to the _London Times_ by its New York correspondent. The matter was commented upon in the _Engineering_ magazine of London for June 5, 1891. That publication observed that since the time of the invention of the telephone there had been efforts to do for sight what the telephone did for sound. Of Edison’s invention of the motion picture camera and viewer it was said, “It is a matter of much less importance and much less originality than thought.” It was asserted that it would not be possible to photograph interiors at the rate of 46 pictures per second. But Edison was doing just that in his first motion picture studio. In the early part of 1893 it was decided to market commercially the peep-show motion picture devices. After a year’s postponement, the Chicago World’s Fair was scheduled to open in the Spring of 1893 and this was thought an ideal place for the debut of the apparatus. In January of 1893 the famous “Black Maria” Edison Studio was constructed chiefly of tar paper at a cost of about $600, and the first commercial films made. Dickson was producer, director, cameraman and laboratory expert. Fred Ott, a laboratory mechanic, and his sneeze were among the first actors and film “acts.” Other subjects included dancers and similar entertainment subjects of a vaudeville character, together with scenic views. The debut of the projection apparatus had been heralded long before it actually arrived. The _World’s Columbian Exposition Illustrated_, published for the Chicago Fair of 1893, said: