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This short nonfiction film depicts the intensive testing that goes into developing and producing aircraft propellers. It opens with the whirring or propeller blades. Animated diagrams show how the bite of the propeller moves it through the air and how the pitch determines the size of the bite. A trip through an airplane factory shows the manufacture of a satisfactory alloy. The rest of the process is painstaking hand work interspersed with dozens of careful inspections. The operation of the variable pitch mechanism and its use in taking off and cruising is shown. Then the propeller is assembled the complete job is tested for balance.
Buenos Aires, the commercial, financial, and industrial hub of predominantly agricultural Argentina. A grain broker and a packing plant employee, with the family of the latter, are introduced as representative city-dwellers. The vast pampas regions, the source of Argentina's agricultural wealth; the dependence of the city on the rural hinterland. Spanish dialogue is periodically incorporated into the film story. An instructional sound film.
United States. Department of Agriculture, United States. Department of Agriculture. Forest Service
Summary:
Introduced as "the story of cattle grazing in the national forest," the film depicts cooperation between the Forest Service and local ranchers to manage the grazing of herds on public land. Original USDA catalog entry states: "Range management in the western national forests. Shows how to perpetuate grazing lands by protecting them from overuse by livestock and thus insure the income of ranchers and communities dependent on the livestock and grazing industry for a living" (Motion Pictures of the United States Department of Agriculture, 1945, 41). Depicts rounding up, branding and inoculating cattle in preparation for driving from private range land to National Forest. Shows duties of Forest Rangers, including monitoring fences and health of grasses. Cutting, raking and stacking of hay using mostly horse-drawn implements is shown. Concludes by showing that U.S. Forest Service range management has helped western "cow towns" to prosper and grow.
United States. Department of Agriculture. Bureau of Entomology and Plant Quarantine
Summary:
A presentation of the Bureau of Entomology and Plant Quarantine's code for the prevention of termite infestation. Using animated diagrams and detailed photography of actual termite infestations, the film educates builders and homeowners in inspection, remediation and prevention methods. Poor construction practices invite the ravages of these devastating insects. The film shows how buildings can be protected from further damage and points to be observed undertaking new construction. "It costs us 50 million dollars a year to feed the termites, it costs far less to block them," concludes the narrator.
Shows how intelligent probation can change a boy's attitude and conduct. In company with his gang, Johnny steals a car, which is wrecked during the excitement of their get-away. What might have happened to the boy is realistically portrayed in a sequence of vivid police and prison scenes. What actually happens to him in a good juvenile court with well-organized probation service provides a stirring contrast. A plea for youth and justice.
Presents episodes from the home, school, and play life of children in a representative Chinese village. Traditional patterns of Chinese family life are portrayed. School training in loyalty to parents, together with home and community customs, reflects the influence of Chinese tradition on contemporary life. Recreational activities are shown, and Chinese dialogue is reproduced and interpreted.
Erpi Classroom Films Inc., Arthur I. Gates, Celeste C. Peardon
Summary:
Presents characteristic activities of a boy and girl living in the Swiss Alps. Follows them through the Alpine village as they watch the tourists and visit shops where clocks and woodcarvings are sold. Depicts them at home and as they accompany their mother on a long, steep climb up the mountain to the summer pasture where the father and brother are tending the cattle. An instructional sound film.
Encyclopaedia Britannica Films, Indiana University. Audio-Visual Center
Summary:
Shows Chilean mountains, deserts, glaciers, mines, ports, pastoral areas, and an estate in the agricultural Central Valley. Here the role of the estate is seen in relation to the visiting owner and his family, the farming population, and Chilean agriculture generally. On the family's return to Santiago, varied aspects of Chile's capital city are featured. Includes some Spanish dialogue.
Erpi Classroom Films Inc., A.J. Carlson, F.J. Mullin, H.G. Swann
Summary:
Explains the regulation of body-temperature. Contrasts constant temperatures of warm-blooded animals with fluctuating temperatures of cold-blooded ones. Reveals the relationship of body heat to energy furnished by foods, and depicts the blood stream as a heat distributor. Illustrates body heat loss, and regulation by radiation, conduction, and evaporation. Depict the function of hypothalamus in regulating body temperature. For high school, college, and adult groups.
Historical Summary:
Explains the mechanism of body-temperature regulation by radiation, conduction, and evaporation. Contrasts the constant temperatures of warm-blooded animals with the fluctuating temperatures of cold-blooded ones. Reveals the relationship of body heat to energy furnished by foods, and depicts the blood stream as a heat distributor. Also shows the function of the hypothalamus in regulating body temperature.
