Word: prism
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Lensman Valentine's invention has not been patented and he did not disclose exact technical details. But film executives who viewed his work pronounced it good. Heart of the device is a prism composed of two paper-thin sheets of glass fitted together at a 45° angle. This is inserted behind the camera's lens, works something like the binocular vision of human eyes. The illusion of roundness goes onto the film so that no special projector equipment is necessary and spectators do not have to wear stereoscopic glasses...
...metal-on-glass on which a series of very fine, parallel lines are ruled close together. In combination with lenses, such a grating breaks up a beam of mixed light, such as the light from a star, into its component wave lengths-that is, it furnishes, as a prism does, a spectrum of bright and dark lines which identify the fundamental elements of matter. The iridescence of mother-of-pearl is a diffraction effect, caused by numerous tiny grooves in the smooth surface of the shell. The making of diffraction gratings is a high-precision job. It is done with...
...years ago, the scientific world was excited by the reported discovery of a mysterious radiation, called "N-rays," by a certain Professor Blondlot of France. Professor Blondlot could not explain the source of the "N-rays'' but he declared that if they were passed through a prism they would cause an electric spark to brighten visibly...
...Wood attended a demonstration in Nancy, surreptitiously removed and replaced the prism in a darkened room, succeeded in showing up the rays as a hoax. The scientific excitement about them subsided with extreme rapidity...
Wheaton girls taking parts are Elizabeth Magill as Cecily, Mary Hill as Gwendolyn, Lady Blacknell, and Dorothy Mountain as Miss Prism. Mrs. H.C. Ballon, formerly connected with the Wellesley "Barnswallows," will direct the production...