Catalogue of Optical Projection Apparatus. (September 1938)

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OPTICAL LANTERNS, ETC. Type A3 Lantern No. l 40 This Lantern is optically the same as the type mentioned on the previous page, but is provided with a brass plate front and a roomy body, which will accommodate a 500-watt Electric Lamp or other illuminant, without overheating. The front and body are finished in black enamel. 140 A3 Metal-Bodied Optical Lantern, as described, finished in black enamel, fitted with 6in. or Sin. Lens and Slide Carrier, but without illuminant £9 10 0 141 Ditto, but fitted with IQin. or I2in. Lens and Extension Tube £1010 0 For Illuminants, see pages 18 to 22. Type D The "Intermediate" Long-range Lantern No. l 170 This Lantern is intended for use in large halls and is fitted with Lenses up to 20in. focus, suitable for long working distances. NEWTON & CO., 72 WIGMORE STREET, LONDON, W.l 7