Science: Stereoscopy

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Moving pictures may be made through a similar screen. But the cameras must be run much faster than they now are. There must be many cameras focused on the same scene, and many projecting machines throwing the images on the screen. Screens must contain minute ridged reflecting and refracting elements of "extreme optical perfection," so that every person in the audience may see every aspect of the picture. Projection lenses must be of "extraordinary defining power." The films must run through the projectors with microscopic precision. Finally, if all the mechanical requirements are accomplished, there remains one more obstacle. No photographic chemicals are yet known which will register pictures as swiftly as Dr. Ives's parallax panoramagram method requires.