Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 277
40 50 60 70 SO 90Fie. 48.—Normal probability curve dotted. With ground glass, ground, as is usualon one side only, the effect when thepolished side receives the incident light is,of course, not the same as when it isreversed. Fig. 49 is a specimen of severalexperiments. I have found no… … Fig. 49.—Ground glass. 0 10 10 30 40 50 60 70 80 90Fro. 60.—Metropolitan Gas Referees* paper. 100 so 60 hi 20 L -x k\ \ \ \\\ V 1 \ \ \ \\\ N * k% J 9080106050<W302010 • -•% \ ? \ Q \\ \ 5 / \l \\ \ \ \\ > \ \\ J > v^. ■*■--. 0 10 10 30 40 50 60 70 80 90 0 JO 20 30 4-0 50 60 70 80 90 Ym.…
Lighting
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