American cinematographer (Jan-Dec 1926)

December, 1926 AMERICAN CINEMATOGRAPHER Twenty-five CLASSIFIED ADVERTISI NG Rates: Four cents a word. Minimum charge one dollar per insertion. All copy must be prepaid and must reach us before the fifteenth of the month preceding publication. CLASSIFIED ADVERTISING American Cinematographer, 1222 Guaranty Building, Hollywood, California FOR RENT OR FOR SALE WANTED— MOTION PICTURE CAMERA WILL PUT »ou in touch wilh buyers for Bell & Howell cameras and equipment. Phone or write t!.e A. S. C. 1222 Guaranty BWIk. Granite 4274. illlvuood. California. FOR CASH, i scd Cell Sc Howell camera and tripod. Lenses and mounts not essential. Low price and good mechanical conditions are chief requirements. I.u Falk, 10 We-t 33rd St., New York, N. Y. BELL & HOWELL or Mitchell Camera outfit; Projection Printer; Cinex timer; Straight Line Processing Machine; Nutting Reflectometer ; Polishing Machine; State price. Equipment. Fred JcfTeiy. Giles Street, Rose South Australia. FOR SALE— CAMERAS BRAND new Eyerro camera, complete with evtra magazines, carrying case, etc.. ysOOOO . . . Also almost new Universal camera, built-in ih »_o've. carrying case, extra magazines, and new Burke and James tripod, $325.00, .arrying __ Frank King. 36 Crestwood Avenue, Buff do, N. V. BFLL & HOWELL, Eyemo Camera— 3.5 lens; Color Filter; Case; Six 100 fr. reels; Daylight Negative; Cost $400.00; Price $275.00. All Brand New. Cameron. Manhattan Beach, N. Y. FOR SALE— LENSES ONE three-inch Dahlmcyer F. 1:9, mounted for Mitchell; one two-inch Bausch & Lomb 1.2:7: one Dahlmeyer Pcntac 37 mm. F.2:9. Georges Benoit, 3306 I, knoll Drive. North Hollywood. CARL ZEISS, F. 2.7, 50 mm. in Bell & Howell mount. Dan Clark, care American Society of Cinematographcr*. NEW 40 mm. Goerz Hypar f. 3 5. lens in Bell & Howell mount; price $50.00. Write Charles Clarke, 1222 Guaranty Building, Hollywood, California. FOR RENT— CAMERAS FOR RENT — Bell & Howell studio equipment complete. 1 70-Deeree Shutter. Liberal commission to cameramen. Call Mr. Smith, Metropolitan 4686. Evening, oil Main 0"47. (l.os Angeles.) AKELFY and Bell & Howell cameras (or rent. John Boyle, 1207 Milton Ave. Phone Granite 2213. Hollywood. California. BELL & HOWELL. Victor Milner. 2221 Observatory Ave., Los Angeles. California. 596-944. MITCHELL, and Bell & Howell Cameras. F.2:3; F.2:7; F.3:5 Lenses— 40-sO-75 mm. Complete equipment. 1. R. Lockwood. 523 North Orange St., Glendale, California. Glendale 3361-W, or UOlly 0764. E. BURTON STEENE. Bell & Howell, and Akeley. Complete Camera Equipment. Latest models. Address American Society of Cinematographers, Hollywood. California. BELL Si HOWELL. 170. with 30. 40. 50 and 75 lens equipment. Baby Tripod. Also B. & H. Cine Motor. Charles Stumar. GRanite 9845. 1201 Vista Street. Hollywood. FOR RENT — One Eyemo camera, complete with all accessories. Bert Glennon, 5905 Carlton Way, Hollywood, California. Phone Hempstead 2743. TWO Bell & Ho.vells. Larce Finders. Also Eyemo for rent. Lenses — F 2.5; 2.3; 2.7 Frank M. Cotncr, 6273 Selma Ave., Hollywood. Hollywood s04(,. FOR RENT— STILL CAMERAS WILL RENT still camera to local parties. Special arrangements to A. S. C. members. Geo. Meehan, Ph. GRanite 3830, 744 Curson Ave.. Hollywood California. FOR RENT — One 4x5 Grade* Camera and one 4x5 Grade. Bert Glennon. i^sO Carlton Way. Hollywood. California. Phone Hempstead 271 "v FOR RENT— AIRPLANES AIRPLANES equipped to carry cameras, facilitating the photographing of stunts or other unusual action, for rent by the hour, day or week. Jerry Phillip*. Proie--innal Pilot, Clover Field, Santa Monica. California. WILL lease f »r Umil' period at very low rent or will sell, Bell and Howell camera No. 4b 1 . fully equipped, excellent condition. Call W. J. Van Ro -:-em 6049 Hollywood Blvd. or write E. H. Rumer, 3764 Arizona St., San Diego. (Continued from Page 24) Let the object be a card O, whose surface is perfectly defined by the lines AB; BC; CD and DA. The path of the rays emitted by the points A; B; C and D strike the surface M, at the points A'; B'; C and D' and their reflection A'E; B'E; C'E and D'E is easily found, according to the laws of reflection. The image of the object O will then appear on the prolongation of the reflected rays at O1 to an eye placed at the point E, and at a distance from M equal to the distance of the object O from the reflecting surface. In other words, the image of O will appear at O' at the same distance as if the object was viewed from a point E', its view unincumbered by the mirror. The image O' will then appear of the same size as O. it will be erect, but reversed as to sides. It is evident that the construction of the incident and reflected rays can be traced from each and every point of the surface of the object and the complete image of O will then be found to be formed at O'. Such an image has no real existence, and can not therefore be collected on a screen. It only appears to the eye, as being formed at O', and is called "virtual". Intensity of Reflection Light IT is obvious that, as the incident light is partially absorbed and partially scattered, the intensity of the reflected light is less than the intensity of the incident light. The intensity of reflected light is also dependent upon the smoothness and degree of polish of the reflecting surface, upon the obliquity of the incident ray, and upon the nature of the reflective surface. Surfaces of different nature affect the intensity of the reflected light, even if their degrees of smoothness and polish and the obliquity of the rays are the same. It is of common occurrence to observe that the highly reflecting silvered surface of a mirror reflects more light than an equally smooth surface of a sheet of white paper. Less commonly observed, but easily veri