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41. Conditioned reflexes : an introduction to the work of Ivan Pavlov (20:09)

Date:: 1948
Summary:: Shows Ivan Pavlov testing his theory of conditioned reflexes by observing the conditioned and unconditioned saliva flow in a dog, feeding fish conditioned to various hunger stimulants, educating a ...

42. Congressional hearings : the drug debate (31:52)

Date:: unknown
Summary:: This film shows excerpts from the three-day subcommittee hearings on patent medicine, antitrust, and prescription drug laws. The bill before Congress, number S-1552, Drug Industry Antitrust Act, is...

43. David Oistrakh : slavonic dance in E minor (05:54)

Date:: 1955
Summary:: David Oistrakh plays the Slavonic Dance in E minor composed by Antonin Dvorak, arranged by Fritz Kreisler, showing his technique as a violin virtuoso.

44. Decontamination of streets (17:31)

Date:: 1953
Summary:: Shows a decontamination squad in England working to make the streets safe from blister gas. Demonstrates the use of anti-gas ointment, respirators, and clothing worn by crews, and explains precaut...

45. Deep end (10:12)

Date:: 1950
Summary:: Presents Ruth, Jump, Marjorie Gestring, and others diving from a 33-foot tower to show championship form in diving. Pictures Iris Cummings and the Hopkins twins as they demonstrate the breast strok...

46. Der Rhein (04:30)

Date:: 1960
Summary:: A small boy's curiosity about the source of his new clothing is used in tracing the production of clothing from raw material to the finished product. Shows several of the manufacturing processes b...

47. Design into space (11:03)

Date:: 1961
Summary:: Students demonstrate the procedures that may be applied to fashion a space design. Details the making of an initial sketch, a three-dimensional model, and a final structure. Shows steps in the cre...

48. 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, f...

49. Effects of metallic ions and osmotic disturbances on the heart (11:49)

Date:: 1944
Summary:: Demonstrates the effects on the isolated turtle heart of calcium and potassium excess, combined calcium and potassium deficiency, and drying.

50. 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. Th...