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Presents a 1948 report on the School Camp experiment authorized by the Board of Education of the City of New York and conducted in cooperation with Life Camps, Inc. Shows numerous examples of chil...
The Conservation Foundation; New York Zoological Society; John H. Storer
Summary:
The fourth in the "Living Earth" series. Shows what happens when nature's balance is upset by exploitation of natural resources. Suggests that organized planning and conservation can arrest the d...
Illustrates the different methods used by various salespeople. Shows how suggestive and descriptive selling aids the customer, the individual salesclerk, and the store.
[motion picture] Demonstrates three slab methods of pottery-making. Shows wedging, forming a candleholder directly from a lump of clay, rolling a slab for a simple tile, and constructing a flower ...
Demonstrates three slab methods of pottery-making. Shows wedging, forming a candleholder directly from a lump of clay, rolling a slab for a simple tile, and constructing a flower container from sev...
James W. McBain; Encyclopaedia Britannica Films Inc.
Summary:
Illustrates in a school laboratory how lye and fat are combined to make soap, and explains, by animated drawings, the chemical action (saponification) which takes place when the mixing occurs. Por...
Photographed at the McMath-Hulbert Observatory, near Lake Angelus, Michigan, this film presents five types of solar disturbances or prominences, including quiescent, spot, cap, quasi-eruptive and l...
Demonstrates active vasomotion as it occurs in arterioles, terminal arterioles, and precapillary sphincters and as it affects the capillary bed in a bat's wing.
Introductory scenes show the techniques used for mounting bats and recording the circulation in their wings. A view of the general distribution of the vascular components is followed by more detai...
Behavior of blood and vascula...; Behavior of blood & vascular
Date:
1948
Summary:
Detailed reactions of the minute vessels and the blood which modify the flow through these regions are demonstrated by high magnification of a bat's wing. The form and behavior of the platelets wit...