Motion Picture Herald (Nov-Dec 1948)

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Get your copy of the new "National" Projector Carbon Handbook. The term "National" is a registered trade-mark «/ NATIONAL CARBON COMPANY, INC. Unit of Union Carbide and Carbon Corporation HERE, for the asking, is the latest word on projector carbons. This handbook is easy to read and packed with useful information—charts, tables, photographs and drawings — everything you need to know to get top efficiency in projector carbon operation. The handbook contains chapters on such subjects as the physics and measurement of light... progress in projection lighting . . . the various types of High Intensity and Low Intensity Arcs . . . carbon arc projection for 16mm film . . . In addition, the handbook provides tips on adjustment and alignment of projector carbons . . . on the amperage and voltage requirements of each type ... on operating precautions and the proper 30 East 42nd Street, New York 17, N. Y. Division Sales Offices: Atlanta, Chicago, Dallas, Kansas City, New York, Pittsburgh, San Francisco care of electrical equipment and optical systems. The handbook will be distributed through the Cleveland office of National Carbon Company, Inc., Post Office Box 6087, Cleveland, Ohio. BETTER THEATRES, DECEMBER 18, 1948