Colour : a handbook of the theory of colour (1916)
Hurst, George H. (George Henry) · London : Scott, Greenwood · leaf 56
on of the violet ; the eye sees, as it RED YEL. GREEN BLUE VIOLET FIG. 22. — Spectrum of green glass. were, the mean of these colours, therefore we say the glass is orange-yellow. Fig. 22 shows the absorption spectrum of a piece of green glass. In this case the glass materially reduces the… … FIG. 23. — Spectrum of blue glass. side and violet on the other. It will be noticed that the glass permits the violet rays (but with diminished intensity) up to the H line to pass, while it stops all the red. In Fig. 23 is shown the spectrum of a blue glass. This is much more complex in character…
Color
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