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96 THREE-DIMENSIONAL MOTION PICTURES As soon as speech was added to the picture it was found that the picture area did not allow enough char acters to be included in a scene if the projected images were to appear large enough to be commensurate with a sufficient volume of sound. The effect- of a series of conversations between two or three characters appear ing in a small, practically square frame in the remote distance is distinctly not entertaining after the. novelty has worn off. Further, the producers are ambitious to attempt to record the stage settings as well as the music of opera and musical comedies. To meet the situation it is necessary to project a picture in which the figures remain of a sufficiently large size but which includes more of them. This means, obviously, a wider included angular field of view and a larger projected picture. To accomplish this, two methods of attack occur at once. One method would consist in moving the camera farther from the set or in using lenses of shorter focal length thereby reducing the size of the images of the individual components of the set and permitting more of them to be included. Now, if this picture is pro jected through a projection lens of sufficient power to restore the figures to the customary size on the screen, a much larger total picture size will result. It will be larger in height as well as in width. Since we are only infrequently interested in any great amount of space above the heads of the human figures in the set we would be embarrassed witti this superfluous space, in general. It would be possible, however, to reduce the frame height, let us say, to the point where its relation to the height of the human figures was restored to somthing like what we have been accustomed to. Now this all sounds very good. Several more frames, possibly twice as many, could be recorded on a foot of film;