Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 83
Companygave a man working on a coal cuttera bulls eye miners rescue lamp. Theman refused to use the lamp after thefirst day, his reason being that he hadto keep changing the position of the lampcontinually. Would it be possible, how-ever, by the use of a very large reflectorwith a matt surface to… … Fig. 6.—Ripping Top. THE ILLUMINATING ENGINEER (march, 1920) 73
Lighting
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