Start Over

13911. Light: Waves or Bullets (29:41)

Date:
1958
Summary:
Watch a searchlight as it pierces heavy night clouds. Notice that you don’t see the beam of light, merely where it comes from: the face of the searchlight, reflections from the clouds or duct blocking the beam. In other words, the light beam itself is invisible. Beginning with a similar demonstration, Edwin C. Kemble shows the difficulty science has had in providing a wholly satisfactory theory of light. He uses a stroboscopically lighted tank to illustrate wave theory and high-voltage discharges to suggest the violence necessary to generate radiant energy with short wavelengths. The violent damage done by X-rays, gamma rays and ultra violet radiation leads Kemble to the corpuscular explanation of light. By an examination of cloud-chamber photographs, visibly recording action in the unseen world of atomic particles, Kemble reconciles the two theories. The yield of this revolutionary work is dramatic: no less than the discovery of a universal property of all forms of existence.

13912. Lightning and electricity (15:02)

Date:
1958
Summary:
Explains lighting and its characteristics. Tells why lightning is first seen then followed by thunder. Demonstrates how lightning produces sound waves. (WCET) Kinescope.

13913. Linguistics Science and the Teaching of Reading (30:12)

Date:
1958
Summary:
In this episode, Dr. Smith, Jr., discusses the use of the linguistic approach as a means of improving reading ability. Analyzes the deficiencies and strong points of the phonics and word methods of teaching reading. Explains the purpose and nature of reading. Shows examples of patterning in the English spelling system. Suggests a remedy to the reading problem using language structure as a basis.

13914. Liquid Air: Physical and Chemical Properties (29:38)

Date:
1958
Summary:
Continues the discussion of liquid air by explaining its physical and chemical properties. Points out the density and boiling point of the components of liquid air. Illustrates the effect of liquid air on lead and mercury. Demonstrates that liquid air is a rich source of oxygen. (KQED) Film.

13915. Little red riding hood (14:33)

Date:
1958
Summary:
Hand puppets make this a lively story for the children. Tom Tichenor has written a new version with the violence deleted. Little Red Riding Hood is a cute little bunny, and when she goes through the woods to her grandmother's house she meets the wolf. When he learns where Red Riding Hood is going he tells her a "short cut" and then runs ahead to the grand­mother's house. There, he hides grandmother, dresses in her clothes and gets into bed to wait for Red Riding Hood. Red Riding Hood discovers the trick as grandmother frees herself and they kill the wolf and sit down to enjoy wolf stew.

13916. Lobsters and crab (29:41)

Date:
1958
Summary:
Teaches how to draw lobsters and crabs. Draws a special crab called a "Heike" which is found only in Japan. Tells a legend about how this unusual crustacean came into being. (KQED) Kinescope.

13917. Major and Minor Tonalities (29:35)

Date:
1958
Summary:
Tonality, the relationship of tones and chords to the keynotes, is further explored in this program. The mood or musical character as it has been affected by major and minor tonalities in western music from 1600 to 1900 come under study. Beethoven’s expressive use of major-minor interchanges receives emphasis here.

13918. Maps and territories (28:43)

Date:
1958
Summary:
Discusses the power and limitations of symbols, especially words. Describes the significance of the communications network in which humans live. Defines words as "maps" giving directions to "territories" of human experience. Stresses the point that words can be manipulated independently of the experiences they represent. Explains other pitfalls of communication related to word usage.

13919. Masks and imagination (30:09)

Date:
1958
Summary:
Perhaps the original need for masks was for man to be able to disengage himself from his everyday life. He used them to symbolize that he was not “himself.” He was another being, human or superhuman, or even an abstract quality. He was able to satisfy two needs through the use of masks – the need for religion and the need for diversion. Miss Leadbeater and Shari Lewis concentrate on masks used for diversion and their counterparts in the modern United States – at Halloween and Mardi Gras.

13920. Matter (29:43)

Date:
1958
Summary:
Discusses and demonstrates matter in its various states: solid, liquid, and gas. Shows how matter is broken up into its smallest components. Explains how energy is obtained from matter. Defines the fission and fusion processes. Concludes with a demonstration of a chain reaction. (WQED) Film.