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MOTION PICTURES 143 tary filmstrip, same title, also available. (OE 184; 28 minutes) 32, 41 Porcelain Protected Surface Wiring U.S. Office of Education, 1944. (Electrical Work Series. Wiring) How to make an electrical entrance to a building; install wiring and porcelain fittings; support and insulate wires; prepare and connect wires for service. Supplementary film- strip, same title, also available. (OE 376; 19 minutes) 32, 41 Pork on the Farm U.S. Department of Agriculture, 1940. Hog production for home consumption; techniques of killing, dressing, handling to avoid spoilage; cutting; curing; ad- vantages of cold-storage service. (21 minutes) 32, 41 Portable Water Purification Unit M1940 U.S. Department of the Army, 1942. Setting up at water point; pump section; filling chemical feed tanks and chlorine feed bags. (TF 5-237; 20 minutes) 41 Position Finding on the Earth U.S. Department of the Air Force, 1942. (Celestial Navigation Series) Geograph- ical position, Greenwich hour angle, local hour angle, relationship of hour angle to longitude, zenith distance and its relationship to altitude, circle of position, line of position, fix, relation of assumed to actual position, and intercept. (TF 1-204; 15 minutes) 7, 32, 41 Positions U.S. Department of the Army, 1943. (Rifle Marksmanship with the M-l Rifle, Preparatory Training Series No. 2) Cor- rect manner of firing the M-l rifle: prone, sitting, kneeling, standing, or off hand; use of the rifle sling, and proper loop adjustments from the firing posi- tions. (TF 7-652; 27 minutes) . 41 Post Operative Care UJS. Department of the Navy, 1943. (Care of the Sick and Injured by Hos- pital Corpsmen Series) How to make anesthetic bed; move patient from stretcher to bed; care for while arousing from anesthetic. (MN 1511-h; 12 min- utes) 41 Poultry: a Billion Dollar Industry U.S. Department of Agriculture, 1939. U.S. poultry industry; large and small poultry farms; hatcheries; markets; cold- storage plants; dressing poultry; liquid- egg business; education and consumer aspects. First prize, International Exposi- tion of Agricultural Films, Rome, May 20-27, 1940. (28 minutes) 32, 41 Powder Metallurgy. Part 1: Prin- ciples and Uses U.S. Office of Education, 1945. (En- gineering Series) Principles of powder metallurgyâpowder, pressure, heat; major industrial applications of powder metal- lurgy; laboratory process of combining silver and nickel powders. Animation. (OE 346; 19 minutes) 32, 41 Powder Metallurgy. Part 2: Manu- facture of Porous Bronze Bearings U.S. Office of Education, 1945. (En- gineering Series) Manufacturing process by which metal powders are fabricated into porous bronze bearings and impreg- nated with oil. (OE 347; 15 minutes) 32, 41 Power and the Land U.S. Department of Agriculture, 1940. Typical family-size farm before and after electrification; formation of electrical co- operative by farm group; savings and benefits of electricity. (39 minutes) 32, 41 Power Bending Conduit U.S. Office of Education, 1945. (Elec- trical Work Series. Wiring) How to assemble and operate a floor bender and a portable bender; make a 45 degree