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may not be spoken from the stage since amplification and distance distort the finer overtones which are essential to perfect enunciation. At lower amplitudes we may hope for more nearly perfect speech rendering but the defective sounds such as s, f , zh, may require artificial modification in the recorded speech curves. Wireless music and telephone are already here. We can provide telephones by which auditors with defective hearing may clearly hear the speaker on the platform. All the master sounds^music, speech, and noises incidental to the story may be produced in the acoustic laboratory of the theatre adjoining the projection room, and be delivered automatically in synchronism by direct connection with the film movement. Each auditor will receive, if he so desires, the music, speech, and sounds by perfected telephone attached to the back of his seat. The standard adjustment could be gaged as to quality and intensity so that for the average ear the sounds are true to nature and subject to volume regulation by each patron. As such mechanism is perfected, it will be less and less in evidence, just as the lamps are concealed in modern lighting and the projector is relegated to a room outside the auditorium. Eventually only the effects will be perceived.
In motion pictures all skilled movements of hand, foot, or body may be speeded up, slowed down, or transformed, selected, blended, and reproduced before everyone who desires it, an unparalleled adjunct to education, or rather a new pedagogy. Can we imagine a collation by slow-motion pictures of all the skill of the world in arts, crafts, sports, and other bodily motions? The startling fact that experts and champions do not know the secret of their own skill makes them helpless to impart it. The skill dies with them . The motion picture knows no such limitation. It can record by the slow motion camera-projector combination and reveal the secret of such high skill, and can impart that skill to the whole world, the film repeating the movement as often as needed and at the optimum learning speed. Such films may be multiplied until all can learn the highest skill attained by man in any or many lines desired. Motion analysis and high, speed cameras can do more. A hundred masters may contribute to a single skilled art, the best elements being selected and combined on the screen in one picture, a consummate model excelling any skill yet attained by man.
May I point out, purely as examples of countless applications, one or two easy next steps in motion pictures composite of instructor, college,: and textbook. Take two very popular and common arts, dancing and the piano. ^ Project moving footprints from below on a ground glass floor showing the steps of a given dance. The pupil follows the steps with his feet regulating the movement from slow to normal as skill develop6s. The same film which projects the footprints i;iiay ^Iso give a life-size jiicture of a skilled dancer executing the same step in exacf time with the moving footprints, or slightly in advande^of them, the picture turning so as to follow the turns of the dancer and remain in view. From time to time helpful hints in print could be included as part of the film projection, giving the perfect evolution by the shadow footsteps. The complete system would
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