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Points out that genetic damage is one of the most serious effects of radiation and shows how the Atomic Energy Commission's genetics research program is geared to learn how radiation damages cells and what the long term effects of such damage might be. Presents Douglas Grahn, a geneticist in the Division of the Biology Medicine, explaining how radiation causes mutations and how these mutations are passed on to succeeding generations. Describes the work of Herman Slatis, also a geneticist in the Division of Biology Medicine, with fruit flies and induced mutations. Discusses fallout and its implications.
Indicates the preparation necessary for entrance into radio work, stressing a strong foundation in science and mathematics. The development of personality and a cultural background is stressed. Gives an overview of radio and its present importance and the application of radio principles to public address systems, sound reproduction, and television.
Visualizes Color-keyed moods, recurrent themes, contrapuntal melodies, and various rhythmic patterns through the animation of Oskar Fischinger. Presents an interplay of shapes, Colors, and movement in GasparColor.
The causes of radioactivity, how it is detected, measured and controlled are noted by Dr. Warren F. Witzig and guest Edward Sanford. They also demonstrate the instability of energy and discuss the different types of radiation. Sanford explains the meaning of alpha, beta and gamma rays and explores the uses and dangers of radioactivity.
"Includes a report from Britain showing the RAF and the 8th Air Force on a hedgehopping bomber flight over France and Germany, and the 5th Air Force report from New Guinea." ("News and Notes," Educational Screen, June, 1944, 266.) Shows a film clip claiming to be an "Official German Newsreel," with footage of American planes that have been shot down and have crashed onto German soil. Shows how Germans salvage metal from these American aircraft to use for their own war effort and explains that each crashed plane is indicative of loss of soldiers' lives. Ends with a message from General Eisenhower asking the American people to support the Fifth War Loan Drive.
Introduces Rafael Mendez, who plays several selections on his trumpet and discusses his instrument and playing technique. Includes an orchestral accompaniment. Ends with Mendez and his twin sons playing an original composition.
Records the activities and sounds in a freight yard upon the arrival of a freight train. Portrays a turntable in operation, a steam locomotive in a roundhouse for servicing, a diesel engine moving through an automatic washer, and the reassembling of cars into a new train. A recording of the film-sound and music accompanies the film.
After looking at the first railroad engine, the Tom Thumb, and the De Witt Clinton, and seeing an engine in a race with a horse, wherein the horse won, Bash climbs aboard a real engine of the early days, and has a ride. She shows how the engine worked, and even mounts to the cab to throw wood in the firebox, and handle the throttle. The engine is the “Genoa, #12,” of the Virginia & Truckee Railroad, which hauled millions of dollars’ worth of gold from the Comstock Lode in Nevada. Songs include “Puffer Belly,” “Casey Jones,” and “Little Red Caboose.”
The fabulous story of the men who built the railroad to join the Atlantic and Pacific coasts is told by Bash Kennett. The struggles of the laborers in the west who battled granite cliffs in order to lay more track than the crews on the plains who had to import their lumber is told. Songs include “Midnight Special,” “Down in the Valley” and “Drill Ye Terriers.”
Uses simple terms and illustrations to explain and discuss the water cycle, evaporation, and condensation. Shows the phenomenon of a rainbow and the effects of wind, cloud formations, and sunshine on evaporation.
The Friendly Giant reads the book, Raindrop Splash, by Alvin Tresselt, illustrated by Leonard Weisgard, and published by Lothrop, Lee & Shepard. After the story, the Friendly Giant and Jerome the Giraffe talk about how you can keep dry when it rains. (WHA-TV) Kinescope.
Reveals a candid portrait of Ralph Ellison, author of The Invisible Man. Presents Ellison discussing the function of the writer in society, how he came to write The Invisible Man; his own involvement with the work, and how he feels a work of art should engage all of a writer's being. Features the author reading from this work and commenting on the contribution which the Negro church has made to the eloquence of most Negro writers.
A rocket motor operates for a short time and then the missile coasts the rest of the way up and down. Once into the coasting period there is no way to change its trajectory. Stray missiles are prevented from leaving the range by stopping their motors before the burning is scheduled to end. Some missiles can be guided from the ground. Three types of guidance systems are: Command, Beam Riding, and Homing.
Segment from episode 20 of Black Journal. Points out that discrimination within labor unions restricts minority membership, thus perpetuating the existing power structure. Notes that minorities in the New York local of the Transport Workers Union are trying to overcome discrimination by forming their own union. Indicates that although the TWU organizes on Transit Authority property, other groups are not allowed to do so.
Marionettes are used to tell the story of a wife who longed for some rapunzels (cross turnips and rutabagas) which grow in a witch's yard. The husband agrees to give the witch his first child in exchange for the rapunzels, but does not tell his wife of this. Their first child is born and the witch comes for her and takes the child away to a tower and names the child Rapunzel.
Uses such situations as computing a baseball player's batting average and adapting a recipe to illustrate the principles and uses of ratio and proportion. Explains the terms used, the difference between ratio and proportion, and the application of the principles to gears.
Shows that ratio expresses a relationship between two numbers. Points out that equal ratios form a proportion, which may be used in solving problems, stressing that the units must be the same in finding ratios between two numbers.
Explains the principle of propulsion, and illustrates the way in which the design of a rocket engine increases the speed of escaping gases. Illustrates the law of momentum as applied to propulsion. States that one of the biggest problems of jet designers is that of making jet gases go faster. (New Mexico College of A. & M.A.) Film.
