Motion Picture Herald (Oct-Dec 1951)

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Actual Comparative Teste Prove that the brightest pictures can be projected at lower operating cost, regardless of how big the screen, by using the NAnONAL 75 to 130 ampere high intensity reflector type PROJECTION ARC LAMP Air-cooled rotating positive carbon feeding mechanism. Big 163^" reflector matches highspeed f/1.9 lens. Automatic arc crater positioning. Stable burning and complete combustion at the arc, to avoid any black soot, are attained by a jet of air directed just above the arc. White smoke, which would otherwise cloud the mirror, is also diverted hy this air stream. Unit construction permits instant removal of components for cleaning. 6 MOTION PICTURE HERALD, DECEMBER I, 1951