International photographer (Jan-Dec 1934)

June, 1934 T 1 1 e INTERNATIONAL PHOTOGRAPH K !< Twenty-seven The transmission lines connecting the apparatus to the MDF are all of the standard lead-shielded type with twisted pairs of wires, the lines laid together and bound into neat cables. The MDF is enclosed in a grounded metal case as large as a clothes closet ; and the cables all run through metal "gutters," the gutters and the lead shielding on the lines being likewise connected to the common ground system. High and low level speech circuits are kept as widely separated as possible. These precautions tend to prevent cross-talk between circuits and to minimize the pick-up of stray currents and similar extraneous electric disturbances. The next chapter will continue the description of the main studio amplifying equipment and its operation. THE NIKOR TANK Burleigh Brooks, photographic goods, 127 West 42nd St., New York City, announces his new Nikor Tank which, he declares, comprises the simplest and most approved method of loading in existence. The high lights of the new Nikor Tank are: EASILY LOADED— The NIKOR tank is easily and quickly loaded. It is impossible to mar or scratch the film. .No marks are left on the negatives as the only contact point is at the extreme edge of the film. QUICKLY CLEANED — It is easy to detect deposits of dirt and scum on the bright, hard surface of the NIKOR and to remove these by the application of nitric acid in any strength. Even conditions of long and constant usage will neither stain nor tarnish the tank. RAPID DAYLIGHT FILLING— The NIKOR tank allows solutions to be poured in and out (completely) with exceptional rapidity, in daylight. ECONOMICAL — The compactness of the NIKOR obviates the use of an unnecessarily large quantity of developer and prevents serious temperature changes during development. The latter is a common fault in the use of odd-shaped containers. DURABLE— The ruggedness of the NIKOR tank makes it an ideal device for travelers and explorers and whenever hard usage may be expected. It will last a life-time. PHYSICAL DEVELOPMENT— Two German investigators, Dr. Franz Baur and Dr. Gottlieb Imhof have shown that stainless steel may be used for physical development. The NIKOR tank gives excellent results with physical development and can be cleaned with nitric acid as recomrr ended. Capacity Size Price No. 1 for V. P. (127) film 16 oz. 3x35/6" $6.75 No. 2 for 2J4" (120. 117) film 16 oz. 3x35/6" 6.75 No. 3 for 35mm. (S ft. length') film... 21 oz. 2 x 5" dia. 6.75 The Cinematographer's BOOK of TABLES IS ON SALE AT ALL DEALERS Price $loo PLASTIC FILM SOLVED? The problem of the plastic film has been solved, according to reliable reports, by Professor Koegel, of the Technical College in Karlsruhe. After many years' experiments he has invented a process which makes the production of the plastic film easy and comparatively cheap. Methods hitherto followed achieved their plastic effects by the production of a double series of pictures in complementary colors (red, green, for example) and then by the use of red, green spectacles. But to supply each visitor to a cinema with red, green spectacles made the plan impracticable. Professor Koegel's new invention results from a thorough study of the human eye which led to the conclusion that the same system which there produces the breaking up of light rays could be applied to the screen. As a result, he constructed a special screen with a nickel surface which, according to special calculations of light-ray action, produces certain definite ray reflections. It is probable that the new Koegel film screens will be fitted in a number of German cinemas in the near future. — Christian Science Monitor. AMATEURS ! ! PROFESSIONALS ! ! Fresh 35 mm. Eastman or Dupont Gray Backed Negative Film Supplied at .02J/2 per foot. KINEMA KRAFTS KOMPANY 6510 Selma Ave., Hollywood, Calif. GL. 0276 Phone CLadstone 4151 HOLLYWOOD STATE BANK The only Bank in the Industrial District of Hollywood under State Supervision Santa Monica Boulevard at Highland Avenue CINEX TESTINC MACHINES CINEX POLISHINC MACHINES BARSAM-TOLLAR MECHANICAL WKS. 7239 Santa Monica Blvd. Phone CRanite 9707 Hollywood, California Something New ...In Motion Picture Developing L THE DAVIDGE DEVELOPING J PROCESS 1,000 feet of film developed in only 50 gallons of developer. Make your pictures live on the screen by developing to the maximum of gradation. No directional effect; greater color separation. Sound track developed by this method has cleaner, sharper striations, which produces clearer and better sound. Also made in combination units to take either standard or 16mm. film and in small units for amateur use. ■ For full particulars write to ROY DAVIDGE FILM LABORATORIES, LTD. 6701 Santa Monica Blvd. Hollywood, California Please mention The International Photographer when corresponding with advertisers.