Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 245
otice, on April 19th, a discourse byA. A. Campbell Swinton. Esq., on Eleetricity Supply : Past, Present, andFnture. 216 THE ILLUMINATING ENniNEKR. B.T.H. Carbon Lamps. Tlie illustration herewith shows tliefront cover design of the new list ofB.T.H. Edison Cabbon Lamps, justissued by the British… … carbon lamp is still in demand for in-dustrial purposes, and tlie B.T.H. Edisonlamp is still ordered and used in largequantities. The new list will therefore be mostuseful to all carbon lamp purchasers, as itgives complete tables of data on thevarious voltages, sizes, and efficiencies ofcarbon…
Lighting
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