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A NEW ENCYCLOPAEDIA BRITANNICA CLASSROOM FILM Produced in collaboration with Willard F. Libby, Ph. D. THE UNIVERSITY OF CHICAGO What is nuclear fission? What is the dif- ference between chemical energy and atomic energy? How many ways are there of releasing atomic energy? You can show your students the an- swers to these and other questions about Atomic Energy. You can simplify and clarify difficult concepts about the atom and its structure. In the new Encyclo- paedia Britannica Classroom Film, "Atomic Energy," you can present the scientific basis of this terribly important world problem. This film is a must for every junior and senior high school sci- ence class. Every student of social and political problems should see it; parents and other adult groups will find it vital to an appreciation of science's most breath-taking achievement. "Atomic Energy" uses animated draw- ings to explain the structure and the composition of the atom; reveals the re- lationship between mass and energy; includes actual scenes of an atomic bomb explosion. Length is one reel; 16mm., sound. Price, $45. Like all other Encyclopaedia Britannica Films, it can be obtained on the Lease-to-OWN Plan and the Coop- erative Film Library Program. For complete information, write Encyclo- paedia Britannica Films Inc., Dept. 61-C, 20 N. Wacker Drive, Chicago 6, Illinois. There are over 500 other Ertcyclopaedia Britannica Classroom Films. Write for complete description. ENCYCLOPAEDIA BRITANNICA FILMS INC. A m*mb*r of th* Encyclopaedia Britannica Family Announcing 7 More New 1947 EB Films "BUILDING AMERICA'S HOUSES" Collab- orators, Twentieth Century Fund and Miles L. Colean. Analyzes reasons for high building costs; examines ways in which costs can be reduced. "IMMIGRATION" Collaborator, Henry S. Commager, Ph. D., Columbia University. Traces historical immigration into United States. Shows representative types of im- migrants. Depicts melting pot process. "FIRE" Collaborator, Charles K. Arey, Ed. D., University of Alabama. Describes domestic uses of fire, principles of com- bustion, nature of fire hazards and prin- ciples of fire-extinguishing. "PETROLEUM" Collaborator, Lester E. Klimm, Ph. D., University of Pennsyl- vania. Shows importance of petroleum to world technology, commerce and interna- tional affairs. "MAKING SHOES" Collaborator, A. S. Knowles. Ph. D., Rhode Island State Col- lege. Complete step-by-step process of how shoes are made. "THE WATER CYCLE" Collaborator, S. Ralph Powers, Ph. D., Teachers College, Columbia University. Traces eternal cycle of water from ocean to sky and back to ocean. "THE MAILMAN" Collaborator, Paul R. Hanna, Ph. D., Stanford University. Em- phasizes importance of mail in our lives. Shows mailman's relation to mail service. 12 SEE AND HEAR