Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 93
by those wlio areconcerned with coal gas lighting. Atpresent the usual course is to assemblea number of small units when a verypowerful unit is needed. It may be well at this point to referto a question that not infrccpientlyfigures in petrol air-gas lighting lite- 80 THE ILLUMINATING ENGINEER.… … Fig. 1.—Distribution of light from bare mantle(consuming one-ninetieth gallon of petrolper hour). Intensity immediately undermantle 9() C.P. (approx.). from that derived from coal gas. Thelight yielded by a petrol gas mantleshould be almost exactly similar tothat obtainable with high-pressure gas
Lighting
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