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MOTION PICTURES applied to draw silver solder in and out; and flange cleaned after soldering. Sup- plementary filmstrip, same title, also available. (OE 104; 13 minutes) 32, 41 Brazing Flanges with Spelter U.S. Office of Education, 1944. (Ship- building Skills Series. Coppersmithing No. 2) How copper tubing is prepared for flanges; flanges fitted for brazing; borax applied before brazing flanges; tube and flange brazed over a forge; and brazed flanges prepared for installation on the hull. Supplementary filmstrip, same title, also available. (OE 103; 19 minutes) 32, 41 Breakbone Fever: "Dengue" U.S. Department of the Navy. (Medicine in Action Series, No. 3) How female Aedes mosquito attacked base in South Pacific; measures used to cure patients and kill mosquitoes; diagnosis and treat- ment of typical cases. (MN 3726-c; 7 minutes, color) 41 Breakthrough U.S. Economic Cooperation Administra- tion, 1950. History of Aura, Norwegian power project and largest in Europe, related by Aura man; how its building and completion is a story of labor's gains; Marshall Aid, the struggle of men and machines against nature and power sup- plied by Aura to other European coun- tries. American version. (18 minutes) 24 Breast Cancer: The Problem of Early Diagnosis U.S. Public Health Service in coopera- tion with American Cancer Society, 1949. How cancer mortality can be cut 50 percent if disease is treated in 6 months. Complete breast examination; inspection; palpitation and transillumination. Biopsy only certain means of identifying malig- nant tumors. For medical and nursing personnel. (34 minutes, color) . 26 21 Breast Self-Examination U.S. Public Health Service in coopera- tion with American Cancer Society, 1950. Simple technique of self-examination for breast tumors; value of monthly exam- inations to discover tumors in time for successful treatment. Primarily for wo- men's clubs. (16 minutes, color) 26 The Breaststroke, Sidestroke and Underwater Swimming U.S. Coast Guard, 1943. Conventional breast stroke, timing the strokes, and the kick. (12 minutes) 41 The Bridge U.S. Coordinator of Inter-American Af- fairs in cooperation with Foreign Policy Association, 1944. How air travel and transportation will play a large part in modernizing the remote inaccessible re- gions of Latin America. (30 minutes) 32 Broaching an Internal Keyway U.S. Office of Education, 1945. (Machine Shop Work Series. Operations on a Broaching Machine No. 1) What internal broaching is; how the broaching tool cuts; principles of broaching tool design; how to select the broaching tool for the job and operate the horizontal broaching machine. Supplementary filmstrip, same title, also available. (OE 236; 23 min- utes) 32, 41 Broncheogenic Carcinoma U.S. Veterans' Administration, 1949. Op- erative procedures and treatment of broncheogenic carcinoma. For profession- al personnel and medical students. (20 minutes) 31 Brooklyn Technical High School U.S. Department of the Army, 1950. How a New York public high school is equip- ped to provide instruction in all phases of engineering, construction, and manu- facturing procedures. (CAD; 10 minutes) 32, 41