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26 INDUSTRIAL APPLICATIONS Produced for the USAEC by the U. S. Army Pictorial Center. For sale by Byron Motion Pictures, at $160.33 per print, with shipping case. Price to Federal Government agencies is $138.22, if ordered from the Army Pictorial Center. Available for loan (free) from USAEC headquarters and field libraries. Cleared for television. This semitechnical film surveys the current widespread uses of radioisotopes throughout American industry. Three major areas of use are described: nuclear gauging (thickness, density, and level), radiog- raphy, and tracing — with various examples of each filmed at 26 sites nationwide, including the rubber industry, thin strip metal production, plastics, paper mills, nylons, food canning, cement, submarine con- struction, oil industry, automobiles, etc. Covered briefly are lumines- cence, static elimination, isotopic power, and uses of high-intensity radiation. Basic principles are explained by animation, followed by examples of in-plant uses. Benefits to the consumer and manufacturer are highlighted. The excellent safety record is noted. The film, al- though of interest to a wide audience, is designed to acquaint industrial management with the versatility, economy, and ease with which radio- isotope techniques can be adapted to plant requirements. NEUTRON ACTIVATION ANALYSIS See page 37 THE NUCLEAR WITNESS —ACTIVATION ANALYSIS IN CRIME IN- VESTIGATION (1965). 28 minutes, color. Produced by the General Atomic Division of General Dynamics Corporation and McNamara Productions, Gateway West, Century City, Los Angeles, California, for the USAEC's Division of Isotope Development. For sale by McNamara Productions. Available for loan (free) from USAEC headquarters and field libraries. Cleared for television. Among the large number of important applications of the activation analysis method, in many fields of science, industry, and medicine, one of the newest and most promising applications is in the field of scien- tific crime investigation (criminalistics, or forensic studies). During the past few years, research studies have demonstrated numerous intriguing and highly valuable applications of the method to the analysis of forensic samples, i.e., physical evidence samples involved in crimi- nal cases. Neutron activation analysis — a highly sensitive and powerful analytical technique—is a method of analyzing samples for various elements by bombarding them with neutrons, to make some of the elements radioactive, and then identifying and measuring the induced radioactivities to complete the quantitative analysis. Because of the tremendous sensitivity of high-flux (nuclear reactor) neutron activation analysis, samples far too small to be analyzed by