Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 207
guide to recent commercial developments, and we welcome the receipt of allbona-fide information relating thereto.] PROGRESS IN GAS-FILLED LAMPS. We have received from several of theleading makers of electric gas-filled lampsintimations of the introduction of 40-watt 100-130 volt and 60-watt 20O-260… … Two Mazda types of such lamps,as furnished by the British Thomson-Houston Co., Ltd., are illustrated. Bothlamps have ring filaments and can beoperated in any position.
Lighting
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