Schereschewsky, Joseph Williams, 1873-, Tuck, Davis Henry, 1886-1953, United States. Public Health Service. Public health bulletin no. 71 · Washington, Govt. print. off. · leaf 240
was measured at 10.40 a. m.,on July 16. The sky was clear with 50 per cent cmnulus clouds.The sky angle was 57.5°. The illumination was 52 foot-candlesaverage, 80-foot candles maximum, and 26-foot candles minimum.The windows faced on Twenty-sixth Street and the opposite buildingswere white. The… … Fig. 1,—Machines, shop No. 18 (on first and second floors), showing poor lighting arrangement.(Note absence of lamps from reflectors.)
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