15611. Body defenses against disease (10:28)

Date:
1937
Summary:
Demonstrates through animated drawings and cinemicrography the three lines of defense against infection--the skin and mucous membranes, the lymphatic system, and the circulatory system including liver and spleen. Explains immunity to certain diseases, and describes how man can improve defenses against infection.

15612. Electrons (10:59)

Date:
1937
Main contributors:
Erpi Classroom Films, inc., Harvey B. Lemon
Summary:
Through animated drawings and photography explains the hypothesis that electricity consists of unit elementary charges. Demonstrates the conduction of electricity through solutions, gases, and vacuum: Faraday's laws; movement of charges in vacuum tubes: operation of photoelectric cells: and reproduction of sound on film. For high school and college groups.

15613. Exploring the universe (10:53)

Date:
1937
Main contributors:
Encyclopaedia Britannica Films, Walter Bartky
Summary:
Illustrates dynamic aspects of stars within our galaxy and of galaxies themselves by use of animated drawings. Includes changes in the Dipper, binary stars, eclipsing variables, trinary stars, motion of stars in the Hyades and Hercules clusters, apparent star motion due to motion of the solar system, galactic rotation, and a portrayal of the theory of the expanding universe. Also describes the principles of refracting and reflecting telescopes.

15614. Future stars (09:05)

Date:
1937
Summary:
Mass exercise, tumbling, acrobatics, horseback riding, soapbox derbies, rowing, swimming and flying miniature airplanes.

15615. Heart and circulation (10:26)

Date:
1937
Main contributors:
Carlson, Anton J. (Anton Julius), 1875-1956., Erpi Picture Consultants, Incorporated
Summary:
Portrays how heart and blood vessels circulate blood throughout the body. Animated drawings depict the nature of the circulatory system and muscular and valvular heart action. Reveals factors affecting the rate of heart beat, flow of blood from a severed artery, and the effect of severing the cervical nerve. Through cinemicrography discloses capillary blood flow. For high school, college, and adult groups.

15616. Parabola (08:45)

Date:
1937
Summary:
Presents a rhythmical development and elaboration of parabolic curves synchronized with the Darius Milhaud ballet suite "La Creation du Monde."

15619. Shelter (11:08)

Date:
1937
Main contributors:
Erpi Classroom Films Inc., Wallace W. Atwood
Summary:
Shows the major concepts in the evolution of shelter, starting with primitive shelter construction from materials close at hand. Traces man's growing ability to change the form of these materials and shows how transportation has increased the variety of his supply. Emphasizes the high specialization of effort in construction of modern kinds of shelters, each designed for a special purpose. An instructional sound film.

15620. The nervous system (09:47)

Date:
1937
Summary:
Shows the structure of the nervous system, together with its pathways and connections; the nature of a nerve impulse; conditions for setting up impulses; their passage from cell to cell; their discharge; and resultant activity, along with reflexes, sensory integration, and finally, activity of the cerebrum.