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September, 1943 Page 261 This new sound motion picture meets an important need of your schools and your community Never before has a knowledge of electricity been so important to every American. It is doing hundreds of new and important jobs in new ways, for the armed forces and civilians. It is serving us on land and sea and in the air, in homes and factories and on farms. In regular and adult classes, schools are providing for hundreds of thousands of men and women and boys and girls who are studying electricity, to help them do their jobs better, to prepare them for army or navy or industry. They all want—and need—more than simple instruction on common uses of electricity. They want to know the fundamental facts on which these uses are based—the theory and principles, as well as the practical applications. Then, when the occasion arises, they can apply this knowledge to new situations—they can figure things out for themselves.The most practical knowl- edge they can get is a sound understanding of theory. That is what this film gives them. The basic facts are all there, told in words and animated drawings, with a clarity and effectiveness that cannot be achieved except through this motion picture technique. "What is Electricity" is available on both 16 mm "What is Electricity" makes extensive use of animated drawings. By this method relatively complex phenomena can be expressed clearly. At the same time the motion itself holds student interest to a degree that would be impossible with a static diagram. and 35 mm film. It is loaned free to schools, or prints can be purchased at small cost if you wish to add it to your permanent film library. Write to School Service, Westinghouse Electric & Manufacturing Co., 306 Fourth Ave., P. O. Box 1017, Pittsburgh (30), Pa. W^stlndiouse PLANTS IN 25 CITIES CJ OffII ' Offices EVERYWHERE