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MOTION PICTURES 99 of engineering process on structures photographed during construction. (21 minutes, color) 30, 40 Kids Must Eat U.S. Department of Agriculture, 1945. Unrehearsed Quiz Kids session correlated with story of U.S. Department of Agri- culture's community school lunch pro- gram to utilize surplus foods and promote better nutrition. (75 minutes) 32, 41 Kill the Louse U.S. Institute of Inter-American Affairs, 1947. How a community can get rid of typhus by killing the louse which spreads the deadly disease. Why clean bodies and clothes are important. Portuguese version "Guerra Ao Piolho" and Spanish version "El Tifo" also available. (8 minutes, color) 32, 37 Killing Weeds with 2, 4-D U.S. Department of Agriculture, 1949. Use of chemical weed killer, 2, 4-D; mixtures and spraying techniques; com- mon weeds before and after spraying. (17 minutes, color) 32, 41 King Chinook U.S. Fish and Wildlife Service, 1945. Life history and migrations of Columbia River salmon; sport and commercial fishing; fishing by Indians at Celilo Falls; how dams impede or stop migra- tion; work of U.S. Fish and Wildlife Service in rerouting migrations to per- petuate the salmon packing industry. (45 minutes, color, silent) 20 King of the Soft Woods U.S. Department of Agriculture, 1949. (White Pine Blister Rust Series) Value of Oregon and California sugar pine; camp life; logging; recreation; blister rust disease; methods of eradicating al- ternate host plants; and utilization of sugar pine. (15 minutes, color; also b&w) 1, 32, 41 Know For Sure U.S. Public Health Service, 1941. Physi- cian's experiences with syphilis: sources of infection, early symptoms, diagnosis, and clinical treatment, prevention, quacks. For male audiences (22 minutes) 26 Know For Sure U.S. Public Health Service, 1942. Im- portance of early treatment in syphilis: case finding and follow-up treatment. Revision. Section on prophylaxis and male sex organs omitted. For mixed audiences and high school students. (15 minutes) 26 Know the Eggs You Buy U.S. Department of Agriculture, 1949. Egg grading plant; candling and carton- ing of eggs, government grade labeling and relationship of grades and uses of eggs. (5 minutes) 32, 41 Know Your Air Force Better U.S. Department of the Air Force, 1949. How Air Force Day activities at an Air Force Base promote better public under- standing of the Air Force; demonstra- tions and various types of airplanes to be seen at typical installations. (SFP 242; 15 minutes) 11, 32, 41 Know Your Ally—Britain U.S. Department of the Army, 1944. Explains to the American soldier the nature of the British and their part in the war. (OF 16; 43 minutes) 41 Know Your Car U.S. Office of Education, 1945. (Automo- tive Operation and Maintenance Series. Automobile Operation No. 1) Construc- tion of a car chassis; how engine func- tions; operations of clutch, transmission, rear axle, brakes, electrical and cooling systems. Supplementary filmstrip, same title, also available. (OE 486; 15 min- utes) 32, 41