Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 82
14B4 Fig. 3.—Standard 36-in. diameter liand-con-trolled projector, fitted with a Louvreflashing shutter operated by a lever from thehack of the projector for signalling purposes. The question of specifjdng the powerof a Projector in candlepower is verymisleading and really meaningless,although… … Fk;. 4.—Portable 36-in. diainctcr electrically operated projector and cable drumfor field purposes, as supplied to a foreign power. (.1/r. //. //. Joliiisoii.)
Lighting
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