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THREE-DIMENSIONAL MOTION PICTURES jectors and other equipment were all hand-built by Simplex. Details of Grandeur Pictures will be found elsewhere in this book. The stereoscope is older than motion pictures., in fact it's older than photography, the subject of binocular vision has been studied and written about since the days of Galen in the year 170. It has been the hope and dream of several hun dred of workers in the field of stereoscopy, ever since motion pictures were first introduced, to perfect a system whereby a third dimension could be given the projected picture, without the use of glasses or other mechanical viewing devices. Millions of dol lars, and years of working time have gone into the attempt to perfect such a system, to date no one has been successful. Hope for third dimension mo tion pictures without the use of some mechanical viewing medium is something for the very distant future. The first stereoscopic pictures were drawings viewed in instruments similar to the hand instruments in troduced by Holmes and afterward found on the par lor table of most homes in the early days of pho tography. It is not generally realized that the eyes see two distinct and slightly different pictures of every object on which they are directed. A simple example will make this plain: Close your left eye and in front of your right eye,, about one foot from it, hold upright the first finger of your right hand and then one foot away hold up the first finger of your left hand in a line directly with the other finger. You will find that you can see only one finger, the nearest one. Now close the right eye and open the left and you find that you can see both fingers and that the farthest away is to the left of the other. Herein we have a