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FILMSTRIPS 239 Dividers, Parallel Rulers, Protractors U.S. Coast Guard, 1943. (Piloting Ser- ies) Characteristics and uses. (33 frames) 41 Do You Know? A Picture Quiz on Farm Safety U.S. Department of Agriculture, 1945. How to prevent accidents in farm home and on farm. To be used as regular filmstrip, discussion guide, and safety quiz. (28 frames) 39 Double Carrick Bend U.S. Coast Guard, 1943. Reviews ma- terial presented in motion picture, same title. (23 frames) 41 Double Ram Vertical Surface Broaching U.S. Office of Education, 1945. (Machine Shop Work Series. Operations on a Broaching Machine No. 3) Reviews material presented in motion picture, same title. (OE 238; 34 frames) 41 Draw Bench Operations U.S. Department of the Navy, 1942. Purpose of draw bench; how to set up draw bench and make a pattern; and operate machine. (SN 258; 54 frames) 41 Dressings and Bandages. Part 1 U.S. Department of the Navy, 1942. (First Aid Series) Materials used and how to apply bandages to wounds. Straight photography, titles. (SN 221-a; 52 frames, synchronized disc, 13 min- utes) 41 Dressings and Bandages. Part 2 U.S. Department of the Navy, 1942. (First Aid Series) How to apply tri- angular head bandage, cravat bandage for scalp, forehead, eye, arm, forearm; roller gauze bandages for fingers, arm, leg; four-tailed bandage for chin, jaw, nose, head, crotch. Straight photography. (SN 221-b; 42 frames, synchronized disc, 11 minutes) 41 Driftmeters U.S. Department of the Air Force [1943?]. (Aerial Navigation Series. Dead Reckoning Instruments No. 1) Nature of drift and its effect on aircraft; con- struction of driftmeters and how they function. (FS 1-324; 56 frames) The Drill Press U.S. Office of Education, 1945. (Machine Shop Work Series. Basic Machines) Re- views material presented in motion pic- ture, same title. (OE 71; 32 frames) 41 Drilling a Hole in a Pin U.S. Office of Education, 1943. (Machine Shop Work Series. Operations on the Drill Press. Sensitive Drill No. 1) Re- views material presented in motion pic- ture, same title. (OE 46; 35 frames) 41 Drilling and Tapping Cast Steel U.S. Office of Education, 1943. (Machine Shop Work Series. Operations on the Drill Press. Radial Drill No. 1) Re- views material presented in motion pic- ture, same title. (OE 22; 48 frames) 41 Drilling, Boring, and Reaming Work Held in Chuck U.S. Office of Education, 1943. (Machine Shop Work Series. Operations on the Engine Lathe No. 4) Reviews material presented in motion picture, same title. (OE 9; 47 frames) 41 Drilling, Tapping, Stub-Boring, and Reaming U.S. Office of Education, 1945. (Machine Shop Work Series. Operations on the Horizontal Boring Mill No. 6) Reviews material presented in motion picture, same title. (OE 230; 29 frames) . 41