Catalogue of Optical Projection Apparatus. (September 1938)

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OPTICAL LANTERNS, ETC. Lanterns for use in Small Classrooms, Mission Halls, etc. These Lanterns have been produced mainly with a view to compactness and ease of manipulation. The non-essentials have been reduced to a minimum, but the essentials themselves, viz., the objective, condenser, and illuminant, are of thoroughly good quality, and may be relied upon to give excellent results upon the screen. The electric projection Lamps are permanently fixed in position and do not require centring before use, and the illumina- tion of the picture on the screen is brilliant and even over the whole field. The range, of course, is limited, but the instruments are primarily intended for small displays, such as are required in classrooms or parish halls. A skilled operator is not required, as the instruments are exceedingly simple to manipulate. The No. l120 is the most popular model and will give a well- illuminated picture up to 7 feet square, the Lantern being placed at 14 feet from the screen. The No. l121 is fitted with a more powerful lamp, and will give a picture of 9 feet square at a distance of 18 feet from the screen. Where the electric supply is over 100 volts, a Resistance is necessary, and these are supplied with a series of terminals, so that the outfit can be used , on any current from 100 to 250 volts. l120 The “ Wigmore ” Junior Lantern, complete with IQQ-watt Lamp for \00-volt current, Ain. Condenser and Double Achromatic Objective ... ... ... ... £515 6 NEWTON & CO., 72 WIGMORE STREET, LONDON, W.l 5