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Shows how freedom was prized during World War II despite its high cost in desolation and hunger and how more fortunate peoples helped liberate Europe by fighting the threat of famine.
Presents the proper methods for dissection of the frog in order to observe its anatomy. Indicates the structures which can be observed by opening the mouth. Depicts proper incisions to make in orde...
Uses animation, diagrams, plans, scale models, and scenes of representative buildings (particularly French cathedrals) to explain and illustrate the development of Gothic architecture in the 12th a...
Discusses radius, threading, sheer-cut finishing, round-nosed finishing, and side-facing tools. Demonstrates the correct setting of the tools and the type of cut each makes.
Traces the historical development of the camera, discussing the reasons for subsequent changes from the original camera obscura of 1553. Demonstrates finally that every camera, whatever its make, c...
Division of Visual Aids, U.S. Office of Education (Producer); Federal Security Agency (Producer); Ray-Bell Films, Inc. (Producer)
Summary:
Explains why accessories are used with gage blocks; shows how to inspect a plug gage, an adjustable snap gage, a profile gage, a ring gage, and a screwthread pitch; and shows how to build a height ...
Illustrates abnormalities in gait caused by pain, structural defects and deformities, neuromuscular disorders, and a combination of these causes. Details technical symptoms of the gait and posture ...
Shows some properties that distinguish gases. The volume of ammonia and hydrogen chloride that combine are measured quantitatively, and simple integer volume ratios are measured for the combination...