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U. S. GOVERNMENT FILMS forward to a better future; documentary of work begun by UNRRA and con- tinued by ERLAAS, a Marshall Plan agency headed by Dr. John Logan of Rockefeller Foundation. (22 minutes) 24 Adventures of Junior Raindrop U.S. Department of Agriculture, 1948. Animated cartoon supplemented with "live" action scenes of a raindrop's visit to earth; good watershed management practices; results of good and bad water- shed management. (8 minutes, color) 3, 32, 41 Aedes Aegypti Control U.S. Public Health Service, 1946. (Den- gue and Yellow Fever Control Series) Inspection in dengue and yellow fever control; habitat and life cycle of A. Aegypti mosquito; inspector's work: equipment, inspections, and reports; their follow-up: duties of clean-up and maritime crews, and location and treat- ment of heavy foci. Animation. 2d ed. (CDC-4-011.1; 18 minutes) 27 Aerial Delivery Containers. Part 1: Loading and Dispatching U.S. Department of the Army, 1949. Problem of aerial supply of airborne units; how to load and dispatch up-to- date types of containers used for large and small planes. (TF 31-1525; 34 min- utes) 41 Aerial Map Reading U.S. Department of the Navy, 1944. (Navigation Series) How to read aerial map; use landmarks and features to find position; features to observe at sea, in changing seasons, at night, when lost; how to plot course from Corpus Christi to Sabine Pass and determine ETA using landmarks. (MN 83-m; 22 minutes) 7 Aerial Photography. Part 1: Intro- duction, Aerial Camera Types U.S. Department of the Air Force, 1940. Nature and operation of K3B, K7C and K12 aerial cameras and how to prepare the aerial camera for a mission. (TF 1138; 9 minutes) 7 Aerodynamics: Air Flow U.S. Department of the Air Force, 1941. Explains turbulence and skin friction through flow of smoke over various solid shapes and forms, and angle of attack, point of stall, drag, and lift through the use of smoke streams. Continuation of "Aerodynamics: Forces Acting on an Air Foil." (TF 1-160; 18 minutes) 7, 32, 41 Aerodynamics: Forces Acting on an Air Foil U.S. Department of the Air Force, 1941. Theory and principles of forces acting on airfoils; drag, angle of attack, and wing chord; development and use of wind tunnels to measure forces on a wing form; relationship between lift, drag, wing area, wind velocity, thrust, and weight. Continued in "Aerodynamics: Air Flow." (TF 1-161; 27 minutes) 7, 32, 41 Agriculture and Fishing in Japan U.S. Department of the Army, 1945. Primitive cultivation and harvesting of rice, tea, barley, and other crops in Japan; inland and ocean fishing fleet and industry. (M 1068; 27 minutes) 41 Agua, Amiga o Enemiga U.S. Coordinator of Inter-American Af- fairs, 1943. Spanish version of "Water, Friend or Enemy." Portuguese version, "A Aguas: Nosso Amigo Ouinimigo", also available. (9 minutes, color) 37 A Aguas: Nosso Amigo Ouinimigo U.S. Coordinator of Inter-American Af- fairs, 1943. Portuguese version of "Water, Friend or Enemy." Spanish version "Agua, Amiga o Enemiga," also avail- able. (9 minutes, color) . 37