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ABSTRACTS
The Editorial Office will welcome contributions of abstracts and book reviews from members and subscribers. Contributors to this section are urged to give correct and complete details regarding the reference. Items which should be included in abstracts are:
Title of article
Name of author as it appears on the article
Name of periodical and volume number
Date and number of issue
Page on which the reference is to be found In book reviews, the following data should be given:
Title of book
Name of author as it appears on the title page
Name of publishing company
Date of publication
Edition
Number of pages and number of illustrations
The customary practice of initialing abstracts and reviews will be followed. Contributors to this issue are as follows: G. L. Chanier, E. E. Richardson, Clifton Tuttle, and the Monthly Abstract Bulletin of the Kodak Research Laboratories.
Sound Film Developing and Processing. Kinemat. Weekly, 152, Nov. 7, 1929, p. 52. Two models of the "Rovo" developing machine are briefly described. It is a glass tube machine and the film is driven through the various solutions by rollers instead of sprockets. The tubes are enclosed in a light-tight cabinet and the capacity of the larger machine is between 130 and 260 meters per hour.
C. M. T.
Incandescent Spotlight for Panchromatic Film Illumination. Kinotechnik, 11, June 20, 1929, p. 333. An incandescent light bulb is supported between a reflector and a ground glass plate, on an adjustable base. The ground glass plate diffuses the light from the filament through the lens so that no bright spots occur in the illumination. The spotlights are made in two sizes. The diameter of the effective illumination three meters distant for the small spotlight, using a 500-watt bulb, can be varied from 20 to 120 cm., and for the larger spotlight using a 1000 to 3000-watt bulb, the diameter can be varied from 40 to 150 cm. — Kodak Abstr. Bull.
Testing the Dallmeyer//0.99 Cine Lens. Amat. Films, 2, December, 1929, p. 89. The Dallmeyer //0.99 cine lens stopped to//ll, and used in photographing steel work against the sky, showed very little flare. It showed a distinct advance over the //1. 9 lenses in photographing a street scene lighted by shop windows. The definition was very good according to the author, but its depth of focus was rather small. — Kodak Abstr. Butt.
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