Catalogue of Optical Projection Apparatus. (September 1938)

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OPTICAL LANTERNS, ETC. 1105 Heavy Hand-Feed Arc Lamp, six movements, suitable for currents up to 100 amperes Price quoted on request. 1106 900--WATT (30-volt, 30-amp.) Projection Lamp Outfit {Transformer extra) ... ... ... ... £5 7 0 The ^"Institution" Lantern, No. 2 No . l102 This instrument will accommodate a variety of sizes of slides as mentioned in the case of the No. 1 “ Institution ” Lantern, but it is very much more compact, the Body being somewhat smaller and mounted on a baseboard does not call for a special stand. The Condensers are mounted in flat plates, which, for cleaning purposes, can be slid from the housing immediately in front of the lantern body. Ample provision is made for air and water tank cooling, and the illuminant may either be an Arc Lamp or the Lamp which is most popular at the present day, i.e. the 900-watt (30-volt, 30-amp.) Projection Lamp, particulars of which will be found on page 19. There are two models, the difference being the diameter and focus of the Objectives. 1102 “ Institution ” Long Range Lantern, complete with 6\in. diameter Condenser, 2\in. diameter “ Wigmore ” Projection Lens of any focus up to 16 inches. Interchangeable Slide Carrier for any size slides up to 9cm. X \2cm. ... £40 0 0 1103 Ditto, ditto, but fitted with 2>in. diameter “ Wigmore ” Objective of any focus up to 30 inches ... ... ... £50 0 0 NEWTON & CO., 72 WIGMORE STREET, LONDON, W.l 12