Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 349
hart for Determination of Iliumination Curves on a Logaritliinic Scale. (Mr. \V. DA. Kvan.) 338 THE ILLUMINATING ENGINEER (no% . 1916) 04 foot-candles coincides with 1 foot-candle on the chart. On a standard blue print the curveplotted to a logarithmic scale ma) havea range of 10—OOOl foot-candles,… … Fig. 2.—Showing a a a Illumination Curveplotted to logarithmic scale. b b b Illumination Curve plotted to linear scale,c c c Sensation Curve plotted to linear curve (coeff. of reflection 030). In fig. 2 are plotted side by sideillumination curves to a linear andlogarithmic scale and the sensation…
Lighting
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