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UNDERSTANDING THE ATOM SERIES 61 RADIATION DETECTION BY SCINTILLATION (1962). 30 minutes. Produced by the Educational Broadcasting Corporation, New York City, under the direction of the USAEC's Division of Iso- tope Development. For sale by Byron Motion Pictures, at $31.77 per print, including shipping case. A short review of gamma interactions with matter is shown, with par- ticular reference to useful scintillation crystals. The scintillation pro- cess is described, and the efficiency of the conversion of gamma ra- diation to visible light in the scintillator is discussed. Solid and liquid scintillators are shown along with special detection devices using this principle. A description of the operation of a photo multiplier tube is given, and the concept of pulse height is developed. The principle of operation of a pulse-height analyzer is shown, and the spectrum ob- tained with such an instrument is shown and discussed. Brief mention is made of solid-state radiation detectors. RADIOISOTOPE APPLICATIONS IN INDUSTRY (1964). 2&/ 2 minutes. Produced by the Educational Broadcasting Corporation, New York City, under the joint direction of USAEC's Divisions of Iso- tope Development and Nuclear Education and Training. For sale by Byron Motion Pictures, at $28.98 per print, including shipping case, F.O.B. Washington, D. C. This film discusses some of the practical, simple, and easily under- stood methods of putting radioisotopes to work in industry. The pro- gram features Dr. Paul C. Aebersold, Director, Division of Isotope Development, USAEC, who is introduced by Dr. Ralph T. Overman, Chairman, Special Training Division of the USAEC's Oak Ridge Insti- tute of Nuclear Studies and regular lecturer of the series. Using actual radioisotope sources, Dr. Aebersold gives various demonstrations of the degree of their penetrating radiations, the extent to which several types of materials can reduce them and the sensitive methods of de- tecting them. He explains how the principles involved in the demonstra- tions are applied to practical uses in industry. Narrating the film, he tells of the actual use of radioisotope gauges in tire plants and steel mills, of radioisotope tracers used in the petroleum and chemical in- dustries, of radioisotope density gauges used in food plants and of other uses of radioisotopes in industry which improve the efficiency of pro- duction and the quality of the product. RADIOISOTOPE APPLICATIONS IN MEDICINE (1964). 26 minutes. Produced by the Educational Broadcasting Corporation, New York City, under the joint direction of the USAEC's Divisions of Iso- tope Development and Nuclear Education and Training, and the Oak Ridge Institute of Nuclear Studies. For sale by Byron Motion Pictures, at $31.50 per print, including shipping case, F.O.B. Washington, D. C.