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242 U.S. GOVERNMENT FILMS also available. (SN 1059-q; 49 frames, synchronized disc, [20?] minutes) 41 Enroute Procedure U.S. Department of the Navy, 1944. (In- strument Flight Control Series. Airport and Airway Traffic Control Procedure No. 2) Actions taken by pilot enroute; how airway traffic control personnel keep each flight posted and issue instructions to insure safe passage during instrument weather conditions. Revision. (SN 1059- af; 49 frames, synchronized disc, 12 min- utes) 7 Equipment For Hand Spraying Of DDT U.S. Public Health Service, 1947. (Ma- laria Control Series) Reviews several types of hand sprayers and their parts, suitable truck with four wheel drive and air compressor, and spare parts and tools for repairs in field. Photographs. (CDC- 5-084; 67 frames, synchronized disc, 13 minutes) 27 E-6B Computer: Solution of Wind Triangles U.S. Department of the Air Force [1943?] Construction of computer; rules for using computer to solve vector trian- gles; how to solve typical vector triangles with computer. (FS 1^423; 57 frames) 7 Establishment and Maintenance of Grassed Waterways U.S. Department of Agriculture, 1939. How to slope and seed destructive gullies to serve as waterways. (29 frames) 39 Evaluating DDT Dusting in Muriiie Typhus Control U.S. Public Health Service, 1945. (Ty- phus Control Series) Procedure and data comparison for evaluating effective- ness of DDT dusting as a supplementary measure in murine typhus control. Pho- tographs and labels. (CDC-5-026; 101 frames, synchronized disc, 13 minutes) . 27 The Examination U.S. Department of the Army, 1947. (Ex- amining Personnel for Civilian Employ- ment Series No. 3) The job analysis; determination of essential personal char- acteristics for doing the work; and the development, administration, and valida- tion of the examination. (SFS 61-6; ?? frames, synchronized disc, 20 minutes) 41 Exhaust and Intake Manifolds: Ranger U.S. Department of the Navy, 1942. How to remove, inspect and install exhaust and intake manifolds on Ranger engine. (SN 1323; 45 frames) 41 Exhaust and Intake Manifolds: Whirlwind U.S. Department of the Navy, 1942. How to remove, inspect and install exhaust and intake manifolds on Whirlwind en- gine. (SN 1324; 30 frames) 41 Exhibit Ideas U.S. Department of Agriculture, 1942. Training film for county agents on plan- ning effective but inexpensive exhibits; photographs of exhibits analyzed and criticized in notes. (37 frames) 39 Fabricating Metal Aircraft U.S. Office of Education, 1945. (Aircraft Work Series. Metal Fabrication) Re- views material presented in motion pic- ture, same title. (OE 288; 40 frames) 41 Fabrication of Tubing U.S. Department of the Navy, 1941. Fabrication and installation of copper, aluminum, and dural tubing, including making the pattern, cutting the new tubing, annealing, removing kinks and bends, bending, and fitting. An aircraft machine shop demonstration film. (SN 56; 60 frames) 7 Face Milling With a Fixture U.S. Office of Education, 1945. (Machine Shop Work Series. Operations on the