16031. The dynamics of leadership. Roadblocks to communication (29:03)

Alternative title:
Roadblocks to communication; Dynamics of leadership
Date:
1961
Main contributors:
See Other Contributors
Summary:
Professor Knowles examines reasons for poor communication in group discussions and lecture presentations, and explains the functions of a watchdog panel, a reaction panel, and an audience panel. Di...

16032. The dynamics of the circle (14:20)

Date:
1963
Main contributors:
Mannis Charosh; Pelican Films
Summary:
Describes a geometric circle and defines and illustrates such terms as radius, congruent circles, chord, diameter, major and minor arcs, semicircles, and central angle. Shows the relationship betw...

16033. The Earliest Numbers (29:36)

Date:
1955
Summary:
Shows man's first effort to count with symbols, and demonstrates how Egyptian and Babylonian mathematic have contributed to our present number system. Stresses this contribution in terms of the es...

16035. The Early Days of Back Home in Indiana Alliance (08:24)

Date:
June 21, 2017
Main contributors:
Indiana Disability History Project
Summary:
"We'd learned that, it's no surprise, people with disabilities were the most underserved group in the mortgage and lending industry." In this video, Deborah McCarty explains the launching of the Ba...

16037. The ears and hearing (10:09)

Date:
1949
Summary:
Shows how the ear transforms sound waves into nerve impulses, which in turn are interpreted by the brain as sounds. Uses animated drawings to explain sound and how sound waves reach the ear; then ...

16038. The Earth : our planet (19:57)

Date:
1953
Summary:
Describes the formation of our solar system according to the cosmic theory of creation, and explains the changes on the surfaces of the earth and the moon in terms of volcanic action. Illustrates t...

16039. The Earth in change : the Earth's crust (16:01)

Date:
1961
Main contributors:
Encyclopaedia Britannica Films; Donald. A. Boyer, Ph.D. Science Consultant, Winnetka, Illinois, Public Schools; Laurence H. Nobels, Ph.D. Professor of Geology, Northwestern University
Summary:
Portrays the many ways in which our planet is constantly undergoing changes. Shows how ice, wind, and water act to wear away the earth's surface. Illustrates its build-up by volcanic action, earthq...

16040. The Earth Satellite: Part 1 (14:04)

Date:
1957
Summary:
Explains centrifugal force and its relationship to the establishment of an earth satellite. Shows the three-stage missile and the part it might play in the formation of a satellite. Outlines variou...