Schereschewsky, Joseph Williams, 1873-, Tuck, Davis Henry, 1886-1953, United States. Public Health Service. Public health bulletin no. 71 · Washington, Govt. print. off. · leaf 143
s preferable, it has the disadvantage, however, ofrapid fall in illumination gradient, so that the daylight illuminationon a long bank of machines perpendicular to a window will, in manyinstances, be inadequate. With short banks, however, this is not thecase. The deficiency can be supplemented in… … 2. 3 ^ s MACH. No. rio. 10.—Fall in Ulummation gradient on Bewing-maoliine banks placed perpendicular to window. Parallel arrangement of machines.—When machines are placedparallel to windows the illumination is more favorable for operatorswith their backs to the windows. Those facing the windows…
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