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All organisms tend to maintain their organization in spite of changing environmental conditions. Dr. Roney describes the different types of responses which organisms make to stimuli. Using the micr...
One segment from episode 119 of PBL. Describes the campaign to save Illinois' archaeological sites from urban and industrial expansion. Interviews Stuart Struever, archaeology professor at Northwes...
The story is one of the most significant and exciting in the whole history of science. It started with the “impractical” observation of a line in the solar spectrum with no then-known earthly count...
Discusses Alaska's proximity to Russia and its importance as a base of warning in the event of a surprise attack. Depicts the nature of the warning systems and military installations. Interviews mi...
Discusses style as related to form, space, color, line, and scope of treatment. Illustrates these elements with paintings by Avery and Pickett. Demonstrates and discusses various methods of applyi...
Stresses simple sincerity as the basis of good style in any kind of writing from business letters to short stories. Points out that many people lose their naturalness when they begin to write. Disc...
Discusses good style as a portrait of the writer and stresses the importance of developing a style that permits the reader to sense the writer's personality. Considers the personality of five write...
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...