We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
THREE-DIMENSIONAL MOTION PICTURES 35 same plane. If the rays r r" be blue, they are brought to a focus at i; if the rays are red they are brought to a focus at I'. This can be proved by holding a silvered button in the sunlight, and looking at it through a purple solution of permanganate of potash, the button will appear either red or a bluish-violet, according as the eye was adjusted for the image i' or i. As a matter of past experience, we would think the light source producing i farther off than that origin ating i'. Thus the chromatic aberration of the eye., regarded as a serious fault, becomes an Important element in the perception of distance. ... An 'object with which we are perfectly familiar, and which we have felt and examined, has an image which covers a certain area of the retina. All objects at the same distance from the eye, whose images cover a larger extent of retina, we regard as bigger, and all with images less, we regard as smaller than the fa miliar thing we have compared them with. The image of a horse, for example, covers a larger area of the retina, than a dog the same distance away from the eye; the horse we conclude is the larger of the two. Our ideas of size are obtained by such comparisons, and in the representation of little known or rarely seen objects, we have to introduce familiar objects with which they may be compared. No idea as to the size of the Washington monument, could be formed* from a picture of it, unless we saw some familiar object alongside, such as men or animals from which to get our unit measurement. Another defect of the human eye, known as "per- sistance of vision" is all important to a study of stereo scopic motion pictures, in fact without this defect in the eye, we would not be able to see the illusion of motion on the screen.