113. Discovery: Who Walked Here? (29:30)

Date:
1957
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Summary:
Shows how animal tracks may be identified and explains how various types of tracks are classified. Demonstrates the making of track stamps through the use of potatoes. Discusses the making of plaster casts of tracks and the wiring of stories using tracks. (WGBH-TV) Kinescope.

115. Doctors in space. Collision stations (29:06)

Date:
1958
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Summary:
Discusses the problem of meteorite damage during space travel. Demonstrates the Navy's full-pressure space suit for emergency exit. Explains the difficulties of escape and survival in space. Features Captain Charles F. Gell of the Naval Air Material Center in Philadelphia, and Dr. Fritz Haber of Avco Manufacturing Corporation.

116. Doctors in space. Living room in the void (29:15)

Date:
1958
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Summary:
Discusses protective devices for flyers in space. Demonstrates the Air Force partial pressure suit. Explains the effects of "explosive decompression." Presents a design for a three-stage rocket vehicle, and points out special features of the cabin unit. Features Colonel Henry M. Sweeney, former director of research at the School of Aviation Medicine at Randolph Air Force Base, and Mr. Krafft A. Ehricke of General Dynamics Corporation.