Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 30
he apparatus is shown diagram-matically in Fig. 2. It is mounted ona substantial base B the lamp L tobe tested being attached to an adju.st-able rod D, which can be moved up anddown or to and fro. When morepowerful lamps are to be tested, itmay be desirable to remove this arm(which can be done by… … Fig. 1.—Showing general appearance of new model of Holopbaue Lumeter(Dimensions: 5} x 4jx IJ.) >^ Yet another convenient piece of ap-paratus is a screen made of the usualground celluloid material which screwson to a tripod for horizontal measure-ments. This screen may be mountedin gimbals, so as…
Lighting
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