Colour : a text-book of modern chromatics with applications to art and industry (1904)
Rood, Ogden N. (Ogden Nicholas), 1831-1902 · London : Kegan Paul, Trench, Trübner · leaf 78
r for mapping down our results. There is, however, another point to be attended to. When we come to examine the red glass carefully with the spec- troscope, we find that it not only transmits the red rays powerfully, but that a little of the orange rays also passes through with still smaller… … Fig. 17. — Spectrum, showing the Extent and Intensity of the Coloured Light transmitted by Red Glass. The shaded portion represents the transmitted light. « sible, to represent the different intensities by shading on paper ; hence physicists have adopted a certain«convention which removes this…
Color
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