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MOTION PICTURES 101 graphic and mouse inoculation tests. (CDC-4-111; 5 minutes) 27, 41 Laboratory Diagnosis of Tuberculosis U.S. Public Health Service, 1947. Ex- position of diagnosis of T.B. by means of cultivation of tubercle bacilli on modified Lowenstein's medium. For laboratory workers and T.B. specialists. (20 min- utes) 26 The Laboratory Diagnosis of Tuber- culosis. Part 1: Preparation of a Cul- ture Medium U.S. Public Health Service, 1949. (The Laboratory Diagnosis of Tuberculosis Series) Necessity for bacteriologic diag- nosis of T.B.; advantages of modified Lowenstein medium; ingredients, prep- aration, tubing, inspissating, testing, and storing of medium; and characteristics of colonies on medium. (CDC-4-089.1; 14 minutes) 27, 41 The Laboratory Diagnosis of Tuber- culosis. Part 2: Preparation of Spu- tum Specimens U.S. Public Health Service, 1949. (The Laboratory Diagnosis of Tuberculosis Series) Effective and reliable technique of sputum preparation used in laboratory diagnosis of T.B. to simplify T.B. diag- nosis methods and supplement mass X-ray programs. (CDC-4-089.2; 16 minutes) 27, 41 The Laboratory Diagnosis of Tuber- culosis. Part 4: Typing of Tubercle Bacilli by Animal Inoculation U.S. Public Health Service, 1950. (The Laboratory Diagnosis of Tuberculosis Series) Animal inoculation technique of typing T.B. with cultures standardized and diluted to insure validity of results of such typing. Animation. (CDC-4- 039A; 14 minutes) 27, 41 Laboratory Procedures U.S. Department of the Navy, 1945. (Dentistry Series. Anterior Acrylic Bridgework No. 2) Close-up photography shows in detail the construction of an acrylic bridge. Direct technique is clearly shown. Special film for dental personnel. (MN 4352-b; 19 minutes, color) 41 Lake Carrier U.S. Office of War Information, Domestic Branch, 1942. How iron ore is transported from the Mesabi ranges of Minnesota across the Great Lakes to the steel mills of Gary, Pittsburgh, and Youngstown. (9 minutes) 32, 41 The Land Must Eat U.S. Institute of Inter-American Affairs, 1947. Why increased use of barnyard manure, compost, green manure crops and crop rotation to replenish depleted soil is necessary for good crops. Cross section of well-fertilized and neglected soils with seeds shows difference in plant growth. Portuguese version "Como Cuidar Da Terra" and Spanish version "Hay Que Alimentar La Tierra" also available. (9 minutes, color) 32, 37 Landing Accidents U.S. Department of the Navy, 1947. (Primary Flight Training Series) Proper landing technique: go over check-off list; be alert always; make a good ap- proach; keep proper interval and sharp outlook for danger; make second turn if necessary; keep air speed adequate; re- member check-off list. Live photography. Animation. (MN 4353-f; 6 minutes) 7 Landings U.S. Department of the Air Force, 1944. Explains traffic pattern and landing: the five factors such as wind, drift, key point, etc., to be considered; common errors; cross-wind landings; power landings; landings with engine throttled back; and landing a BT-13. Flight instructor lec- tures with blackboard, still photos, mod- els and actual landings. (TF 1-3319; 28 minutes)