15611. Lenses (09:57)

Date:
1950
Summary:
Explains the effects of lenses on light, and shows the construction and use of a lens. Pictures the types of images formed by convex and concave lenses when an object is placed at varying distances from the lens. Shows the use of lenses in cameras, microscopes, and telescopes.

15612. To hear your banjo play (16:26)

Date:
1947
Summary:
Pictures American folk singers in various parts of the country and discusses briefly the development of folk music here. Peter Seeger is shown singing and playing his banjo in a city setting, and then other singers, including mountaineers, sharecroppers, migratory workers, African-Americans, and railroad builders, are shown.

15613. Hearing deficit and creativity (17:09)

Date:
1969
Summary:
One in a series, this film takes a look at creativity as it is exhibited by children with hearing deficits. Each child reads a set of instructions for a creative activity, and each child interprets the instructions differently. Creativity has been defined as responses to the Circles Subtest of the MINNESOTA TEST OF CREATIVITY developed by Dr. E. Paul Torrance.

15614. Algae (17:14)

Date:
1964
Summary:
Depicts the five major groups of algae, showing growth, movement, reproduction, and nutritional patterns. Describes the tremendous size range of algae from the giant kelp to the minute forms found in a drop of pond water. Discusses the evolutionary development and the economic and ecological importance of the algae.

15615. Experiments in the revival of organisms (19:52)

Date:
1946
Summary:
Presents a record of the successful experiments in resuscitating dead animals conducted at the Institute of Experimental Physiology and Therapy at Veronezh, U.S.S.R., by Dr. S. S. Bryukhonenko. The Institute makes use of apparatus called the "autojector" to carry out the functions of the heart and lungs, and years of pioneering in the technique of resuscitation are climaxed in the sequence showing reanimation of a dog that has been killed. Recommended for use only by individuals or groups professionally concerned with the advancement of science.

15616. The weeks after birth (29:22)

Date:
unknown/unknown
Summary:
Discusses the care of the mother after delivery and demonstrates exercises designed to aid the mother in rapid and thorough recovery. Points out the changes which occur in the mother's body and emphasizes her needs for rest and for proper diet.

15617. Digestive systems in animals (14:50)

Date:
1971
Summary:
Shows the variety of ways animals obtain food and their different types of digestive cavities--fully closed, one opening, and two openings. Examines digestive organs in an earthworm, grasshopper, frog, cat, and bird. Looks at peristalsis in a dog's stomach and the action of the villi in a pigeon's small intestine.

15618. Operation and care of the R.C.A. 400 16mm sound projector (18:40)

Date:
1954
Summary:
Demonstrates the operation and care of the RCA 400 16mm sound projector. Presents detailed instructions for setting up the Junior and Senior models and for initial adjustment, threading, operating, rewinding, and packing up projectors. Demonstrates the cleaning and lubrication procedures for the two projectors and the replacement of tubes in the amplifier section.

15619. Testing intelligence with the Stanford-Binet (18:12)

Date:
1950
Summary:
Shows excerpts from four tests: two six-year olds (I.Q.s 104 and 156) and two ten-year-olds (I.Q.s 100 and 80). Indicates techniques of rapport and standardized administration. Concepts and computation of M.A. and I.Q. presented in detail. An introduction to Stanford-Binet; not intended to teach competent administration.

15620. Research by rockets (27:54)

Date:
1960
Summary:
This film traces the history of rocketry and describes the use of sounding rockets as tools for scientific research in the upper atmosphere; this film discusses the need for such tools, shows how rocket experiments are accomplished, and explains what they have contributed to meteorological and ionospheric research.