Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 501
ht utid Lampe. T. I. E. S.—Transactions of the lUuminating Engineering Society {U.S.A.)Z. f. B.—Zcilsefirift fiir Beleuchtungswesen. THE ILLUMINATING ENGINEER. THE l)olopl)ane Cunteter. THE simple, portable, and accurate apparatus formeasuring illumination, surface-brightness, or reflect-ing power.… … Showing general appearance of new model of Holophane Lumeter.(Dimensions : 5f in. X 4^ in. X If in.) The Holophane Lumeter is of value not only tolighting engineers, but to architects, medical officers,factory inspectors, photographers, and many others. Among the users of this instrument may be…
Lighting
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