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Pictures the globe as a model of the earth and points out the representative shape and color of land and water areas. Identifies the continents and compares their sizes and locations. Uses animation to show the character of the ocean floor. Explains the poles and scales of latitude and compares various types of globes.
Explains the basic principles of gravitational attraction that relate to the earth, and other planets, and the sun. Relates these principles to flights of rockets and artificial satellites and includes the experiments on weightlessness that is encountered by astronauts. Gives a number of practical examples from everyday life and explains the role of gravity in these situations. Concludes with three questions for children to solve.
Reviews Greek history by showing pieces of sculpture from each historical period from 300 B.C. to A.D. 300 and the related architecture. Sculpture proceeded from small animals buried in tombs to large animals and then to undraped youth. Shows the various tools used by the early Greeks in sculpture. Concludes with a non-narrative viewing of various works of sculpture.
Piatigorsky plays "Bourees #1 and #2" from Suite in C Major, by Bach; "Slow Movement" from Cello Sonata, by Chopin; "Masques" from Romeo and Juliet, by Prokofief; "Romance," by Anton Rubinstein; "Waltz," by Tschaikowsky; and "Introduction, Theme and Variations," by Schubert-Piatigorsky.
Shows the cutting action of a grinding wheel; how to select the correct grinding wheel; how to handle and mount the wheel on the collet; and how to true and balance the wheel.
Division of Visual Aids, U.S. Office of Education (Producer), Federal Security Agency (Producer), Emerson Yorke Studio (Producer)
Summary:
Shows how to prepare the machine or the job; how to select and set up a back rest; how to adjust the back rest during grinding; how to rough- and finish-grind the long shaft; and how to check and adjust the taper.
Division of Visual Aids, United States Office of Education (Producer), Federal Security Agency (Producer), Emerson Yorke Studio (Producer)
Summary:
Shows how to mount and dress the wheels on the two-spindle grinder; how to prepare the diaphragm chuck; how to plunge-grind the bore and adjust for taper; and how to grind the shoulder and flange parallel at right angles to the bore.
Shows how to remove blades from inserted-blade type cutter; how to off-hand grind individual teeth; how to reassemble and align cutter blades; how to circle grind; how to surface grind all tooth-relief angles; how to finish surfaces and edges by honing; and how to inspect resharpened cutters.
Shows how to prepare the wheel for grinding; how to semi-finish and finish-grind a dull tool; how to rough-grind a chipped or broken tip; how to grind a newly brazed tool; and how to grind a chip breaker.
Shows in detail how a plane is directed to landing by the ground controlled approach team. Illustrates the principles of operation of the system, and shows the members of the GCA team in action.