2090. How we know the Earth's shape (10:45)

Date:
1960
Summary:
Explains that a globe is the best model to represent the shape of the earth. Discusses the change in man's ideas about the shape of the earth from flat, to curved to round to flattened and bulging to pear shaped. Explains the value of rockets and satellites in helping us to learn more about the shape of the earth.

2091. The house fly (16:31)

Date:
1958
Summary:
Describes the houselfy as a carrier of germs and diseases. Shows the structure of the housefly through microscopic photography and animation. Depicts the life cycle of the fly and its breeding places. Discusses sanitation procedures necessary to control the housefly menace.

2092. Heat as radiant energy (13:23)

Date:
1962
Summary:
Diagrams the position of radiant energy on the electromagnetic spectrum and describes several means of detecting radiant energy. Explains the operation of a radiometer, and illustrates the use of a thermister, thermocouple, and thermophile in detection of radiant energy.

2093. How green plants make food (13:48)

Date:
1961
Summary:
Uses animation, microphotography, and live action to show how green plants make food in the process of photosynthesis. Explains that as scientists study the processes involved in photosynthesis they may some day be able to duplicate the work of plants and make more efficient use of plants.

2094. Helen Tamiris in her Negro spirituals (16:44)

Date:
1959
Summary:
Illustrates modern dance as exemplified by Negro spirituals. Miss Tamiris creates her dances to the familiar spirituals Swing Low, Sweet Chariot, Go Down Moses, and Get on Board Lil' Children.

2095. How seeds are scattered (10:27)

Date:
1957
Summary:
Illustrates and explains the many different ways in which seeds are dispersed--by animals, by the wind, and by water. Points out that only a very few live to grow into plants.

2096. Hormonal coordination 2 : the thyroid and parathyroid (30:31)

Date:
1962
Summary:
A credit course in The New Biology, a presentation of Learning Resources Institute, Columbia Broadcasting Systems, in conjunction with the American Institute of Biological Sciences. The course is planned to include the results of recent research findings in the biological sciences and to reflect the recommendations of professional organization interested in biology education. This installment discusses the thyroid and parathyroid glands.

2097. How machines help us (13:02)

Date:
1962
Summary:
Introduces basic principles of the lever, wheel and axle, pulley, inclined plane, wedge, and screw, and shows common usage of each. Shows the crowbar as a lever, and shows a doorknob as an example of a wheel and axle. Pictures the raising of the flag to illustrate the use of a pulley. Shows stairs as an example of an inclined plane, pictures carpenters driving nails as wedges, and presents the operation of an auto jack as an example of a screw.

2098. Home cookery of fish (11:31)

Date:
1946
Summary:
With close-up photography of cod fillet, habibut steak, and whole dressed white fish, demonstrates three basic methods for cooking fish at home, boiling, and baking. Illustrates the use of garnishes to give eye-appeal and added nutritive qualities to fish when it is served.

2099. High temperature research (18:24)

Date:
1963
Summary:
Describes various phases of high temperature research, giving examples of compounds being used, goals of the research, and some results to date. Discusses procedures being used, with emphasis on procedures with titanium sulfide.