Movie Makers (Jun-Dec 1928)

! J for your 16mm films ri the Van Liew Film File Comprised of six book-units holding two seven-inch reels in tins, and numbered on the outside from 1 to 12 for indexing. Sturdily built of wood, covered with deep green Spanish water-proof artificial leather, unit faces in imitation red leather with lettering and figures engraved Price includes index. in gold If not available from your dealer we can supply you direct. D. VAN LIEW MANUFACTURER 110 EAST 23rd STREET, NEW YORK CITY Em PRICE 15 SHOOT NATURE with your CAMERA Let Nature Magazine be your guide to wild life and its habits. Each issue is a lesson in photography. The illustration here was taken on one of the American Nature Association's Expeditions that have brought back many photographic prizes and fascinating stories. Nature Magazine is a 70-page monthly, profusely illustrated in halftone and color. Send for a Sample Copy or CLIP THIS AD and attach three dollars for one year's membership including Nature Magazine, and send it to American Nature Ass'n 1214— 16th ST., WASHINGTON, D.C. of the screen, this screen being composed of a material permeable to sound, such as scrim. It was at first thought that amplifiers might be used throughout the house, but it was found that at points remote from the stage, the sound from the house horns was just slightly behind the sound from the stage horns It takes the barest fraction of a second for the sound to travel, but this is sufficient to cause a confusing overlap. For more than two years the Vitaphone and Movietone had the field practically to themselves. A year or so prior to 1926, Dr. Lee De Forest sought to introduce his "Phonofilm" device, and this was shown in a number of theatres but was withdrawn. It is now announced that the Phonofilm is about to sue the companies presenting the other devices, claiming invasion of basic patents, but the Lauste patents, which have expired, may be found to cover the basic idea. One other device made its debut and retreat during this time. This was the "Vocafilm," a disc device. After the first showing it was also withdrawn but has now been improved and is at present being used for the showing of short subjects in houses unable to pay the heavy costs of the "public address" installation. It costs $2,000 to put either Vitaphone or Movietone on a projector, and you can have one or both on the same machine. There is a variable cost for wiring and the amplifiers, which brings the cost from $6,000 up to around $15,000. This cost is not a purchase, but a rental of the device for a period of 15 years. Recently the General Electric Company, ostensibly a rival to Western Electric, has brought forward the "Photophone" which uses the "fixed density" principle. In this the sound track does not carry bands of varying density, but varying areas of light and shadow. The higher the tone, the wider the clear portion of the sound track, and the greater the amount of light passed. It is claimed for this form of device that fixed density gives better results than the band, since greater latitude in exposure and development are permissible. A band sound track too lightly printed will at all stages pass more light than a normal exposure, and the entire pitch will be raised. If it is printed too deep, the light passed will be less and the pitch will be lower. In the fixed density, the width of the light band and not its density determines the amount of light passed, and within reasonable limits the tone will remain the same whether the print be "light" or "dense." 604