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NUCLEAR RESEARCH 31 This semitechnical documentary film, a story of teamwork in research, is designed for an audience with an appreciable degree of scientific sophistication, primarily seniors and graduate students in the physical sciences and engineering. Highlights in the operations of the Ames Laboratory, a major installation of the USAEC, are shown by illustrat- ing the steps in the development of the process for the production of yttrium metal. The film also gives insight into the facilities and the pioneering tradition of Ames Laboratory in the investigation of the rare earths. The film is panoramic in style, showing how basic research, development, and production go along together. The following steps in metal processing are shown: separation of yttrium from rare earths, conversion to fluoride, reduction, and arc melting. Special emphasis is given to purity and to the need for careful analytical control. The film also shows how the graduate student fits into the laboratory's research program. MICROSCOPE FOR THE UNKNOWN (Challenge Series) See page 51 OF MAN AND MATTER (1963). 29 minutes, color. Produced by USAEC's Brookhaven Laboratory. For sale by B & O Film Specialists, at $110.00 per print, including shipping case, F.O.B. New York City. This film describes the design, development and operation of the alter- nating gradient synchrotron (ACS) at Brookhaven National Laboratory, shows the various major components of this 33 billion-electron-volt particle accelerator, and explains how the high energy protons pro- duced in the machine are used in physical research. An actual experi- ment is seen, in which the particle beam is guided into a bubble chamber and the resultant interactions with the target nuclei are photographed. The methods adopted in scanning and analyzing the photographs are also shown. By means of a brief lecture, a Brookhaven physicist ex- plains that such gigantic and complex machines as the ACS are nec- essary in order to study the fundamental particles and the forces within the atomic nucleus that are the basic components of all existing matter. SEARCHING FOR THE ULTIMATE (Challenge Series) See page 52 TESTING FOR TOMORROW (Challenge Series) . . . See page 52 WORKING WITH RADIATION (Challenge Series) ... See page 53 THE WORLDS WITHIN (1963). 29 minutes, color. Produced by Stanford University. For sale by Filmservice Lab- oratories, at $65.25 per print, including shipping case.