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ATOMIC ENERGY PRINCIPLES ATOMIC ENERGY (1950). 10 minutes, black and white. Produced by, and for sale by, Encyclopaedia Britannica Films, at $62.15 per print, including shipping case. NOT cleared for television. This film for intermediate and high school-level audiences offers an introduction to atomic principles. With animation, it explains the struc- ture of the atom and defines protons, electrons and neutrons. It de- scribes the process of nuclear synthesis and shows how, through photo- synthesis, the sun's energy is stored on earth and released through combustion. The fission process and the chain reaction are also described. ATOMIC FURNACES (Challenge Series) See page 49 ATOMIC PHYSICS (1948). 90 minutes (2 reels), black and white. Produced by J. Arthur Rank Organisation, Ltd. For sale by United World Films, at $523.00 per print, including shipping case. NOT cleared for television. This film discusses the history and development of atomic energy, stressing nuclear physics. Dalton's basic atomic theory, Faraday's early experiments in electrolysis, Mendeleev's periodic table, and early concepts and size of atoms and molecules are discussed also. The film demonstrates how cathode rays were investigated and how the electron was discovered; how the nature of positive rays was es- tablished; how X rays were found and put to use. The film also pre- sents research tools of nuclear physics, explains work of Joliot-Curie and Chadwick in discovery of neutron, and splitting of lithium atom by Cockcroft and Walton. Einstein tells how their work illustrates his theory of equivalence of mass and energy. Uranium fission is explained, as well as why it is possible to make an atomic bomb. BASIC PRINCIPLES OF POWER REACTORS .... See page 23 BETA RAY SPECTROMETER (1963). 7 minutes, 5 seconds, color. Produced by the USAEC's Argonne National Laboratory. For sale by Byron Motion Pictures, at $22.71 per print, including shipping case, F.O.B. Washington, D. C. By animation and live action, this film explains the principles and working of the Coincidence Beta Ray Spectrometer, a device Which is used to measure the intensity and direction of electron emissions known as beta particles. Components of the device are shown and assembled. A source is introduced. Masking for beam direction and size is dem- onstrated. Detectors are shown and explained.