Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 89
de and Commerceinto the experiences obtained with openacetylene lamps in the metalliferousand salt mines in Prussia, and a corre-sponding inquiry has been made by theFrench LMon. A prize of 5,000 francshas now been offered by the UnitedCarbide Manufacturers for the bestform of acetylene miners… … Fig. 13.—Projector lamp fitted with threeburners each consuming 1 cub. ft. of gasper hour. At a distance of 18 ft. thisgave about 300 c.-p. signal either on land or at sea, and canbe set to work automatically firingevery few seconds, or can be fired asrequired by electricity. ACETYLENE LIGHTING. 77…
Lighting
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