16mm film combined catalog (1966-67)

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CHALLENGE SERIES 51 builds antibodies against disease and other foreign substances and with the effects of radiation on this immunizing response. In a demonstration the experimental procedures of the irradia- tion of rabbits with X-rays is shown and conclusions are dis- cussed. INVISIBLE BULLETS (1962). This film introduces the series and establishes the basic knowl- edge about radiation necessary for an understanding of the other films in the series. The meaning of radiation, its natural sources, the various forms it takes, and how it is used in research are explained. The difference between alpha and beta particles and between gamma rays and X-rays is described. THE LIVING SOLID (1962). This film shows that bone is not a fairly stable substance but is active, living matter, constantly remodeling and reforming it- self. The importance of bone to the entire body as a supplier of calcium is emphasized, and the systems by which this calcium gets from bone to blood and vice versa are illustrated. Effects of radiation are illustrated in photographs of bone cross-sections. MACHINES THAT THINK (1965). Research at Argonne into the future scientific uses of electronic computers is shown in this presentation which stresses non- numerical manipulations of symbols. Computers are taught to make qualitative judgments, to interpret the significance of patterns such as spark chamber photographs, and to control laboratory experimental apparatus. MICROSCOPE FOR THE UNKNOWN (1965). The Zero Gradient Proton Synchrotron at Argonne National Lab- oratory is the scene of this presentation depicting types of ex- perimental apparatus used in high energy physics research. Principles of "track detectors" such as the bubble chamber and the spark chamber are described, and the interpretation of track photographs is explained. A large spark chamber facility for detecting neutrinos and the 30-inch MURA bubble chamber are illustrated in detail. RADIATION AND THE POPULATION (1962). Because genetic damage is one of tne most serious effects of radiation, the U. S. Atomic Energy Commission genetics pro- gram is designed to learn how radiation damages cells and what the long term effects of such damage might be. The film ex- plains how radiation causes mutations and how these mutations