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272 U. S. GOVERNMENT FILMS duction qualities, introduce a uniform terminology, and control pullorum di- sease; how flocks may meet require- ments of three pullorum-control classes and five progressive breeding stages. (48 frames) 39 The Nature of Plant Diseases U.S. Department of Agriculture, 1939. Structure and development of fungi; how fungi cause diseases on various parts of cultivated plants; and control methods. Revision. (47 frames) 39 The Need for Wholesome Thinking U.S. Department of the Army, 1949. (The Character Guidance Program Ser- ies. The Chaplain's Hour) Title self- explanatory. (FS 16-2; 10 frames, color) 41 The New Gardener U.S. Department of Agriculture, 1943. Beginner's course through main steps in gardening: preparing ground, planting various seeds, how and when to trans- plant, weed, stake, and harvest. (49 frames: single; also double) 39 New Guinea U.S. Department of the Navy, 1944. (Theaters of War Series. Pacific Area) How to study land for travel; use fruits, foliage, fish, and animals; sleep; use first aid kit; get along with natives. (SN 1538-e; 78 frames, color, synchro- nized disc, 12 minutes) 41 The 1949 National 4-H Club Camp U.S. Department of Agriculture, 1949. Highlights of program for 4-H Club delegates in Washington, D.C., for 19th club camp. (60 frames: double, color) 42 Occupation, Industry, and Class of Worker U.S. Bureau of the Census, 1949. How to record occupational information; im- portance of being specific; proper and improper entries. (59 frames, synchro- nized microgroove disc, 14 minutes, or script) Oil Systems U.S. Department of the Navy, 1943. How oil system works in V- and radial-type engines; wet and dry sump systems; how to trace simple oil-line failures. (SN 2782; 52 frames) 7 On the Trail of George Washington U.S. Department of Agriculture, 1932, Scenes associated with the life of Wash- ington from birth through youth, Mount Vernon days, the war, and early years of country. Prepared for U.S. George Washington Bicentennial Commission. (75 frames) 39 100 Years of Fixed Wing Aircraft Development U.S. Civil Aeronautics Administration, 1948. Scale models of significant air- craft, 1803-1903, including designs by Cayley, Walker, Henson, Stringfellow, Loup, Du Temple, Le Bris, Wenham, Penaud, Lilienthal, Penaud and Gauchot, Chanute, Wright Brothers, Langley, etc. (46 frames, color) 7 Operation of the Astro-Compass U.S. Department of the Air Force [1943?]. (Aerial Navigation Series) How to use the astro-compass to find deviation correction; how to align astro-compass standard. (FS 1-421; 52 frames) 7 The Operator and His Job U.S. Office of Education, 1945. (Auto- motive Series. Bus Operation No. 1) Re- views material presented in motion pic- ture, same title. (OE 491; 31 frames) 41 The Operator and His Passengers U.S. Office of Education, 1945. (Auto- motive Series. Bus Operation No. 2) Re- views material presented in motion pic- ture, same title. (OE 492; 41 frames) . 41