THE WORLDS OF DR. VISHNIAC 



Color Sound Horizons of Science 



20 minutes Sale Inquire for Rental Sources 



By emphasizing the human and personal side of microbiologist 

 Dr. Roman Vishniac, this film provides a new angle on the con- 

 ventional approach to science. By showing and demonstrating 

 Dr. Vishniac's equipment and his methods of preparing samples 

 and slides for his microscopic-photography work, the film imparts 

 intimate knowledge not only of the subject, but of some of the 

 reasons for the motivation of the protagonist. The film consists of 

 an introduction to the small but very complicated organisms known 

 as protozoa. It also shows Blepharisma undergoing conjugation, de- 

 tails of the structure of Paramecium, Bursaria, and Amoeba, mov- 

 ing and eating, and many other organisms magnified from about 

 500 to 1000 times. 



The story concludes with a significant touch in which scientist 

 Vishniac returns his samples very carefully to a local pond. His 

 explanation that he has only borrowed these animals and must 

 return them before he has the right to take more is only part of 

 the novel approach to this scientific film. 



AUDIENCE: Junior high; senior high; adult 



YOURS IS THE LAND 



Color Sound Encyclopaedia Britannica Films 



19 minutes Rental Sale 



The story begins with the making of soil from the elements of 

 air, sunlight, rock and water. We learn that nature takes from ten 

 to thirty human generations to produce a single inch of top soil, 

 and, by contrast, a map of the United States indicates the frighten- 

 ing rate which top soil is being lost. After carefully reviewing the 

 growth of sample plants through animated drawings, we learn how 

 plants, insects, bacteria and other animals aid in vitalizing the fertile 

 top soil, making their own great contribution to our inheritance. 

 The entrance of man upon the scene and his taking over of the 

 earth introduces problems, and the remainder of the film brings out 

 important facts about erosion and loss of forest lumber and dis- 

 cusses in order the important topics of man's use of soil, forest, 

 water and wildlife. In conclusion the film points out that man, with 

 his increasing numbers and his multiplying machines, will have to 

 plan carefully to preserve the resources of this earth. 



This film replaces the Living Earth Series. 



AUDIENCE: Junior high; senior high; college; adult 



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