Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 276
0 10 20 SO 4-0 50 60 Fig. 47.—Blotting paper and stearin. the result of experiments bearing on theBunsen grease spot, and show scatteringproduced by blotting paper soaked instearin, plain blotting paper, and twointermediate states with the stearinpartly ironed out. … 0 10 20 30 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…
Lighting
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