Measurement of light and colour sensations : a new method of investigating the phenomena of light and colour by means of the selective absorption in coloured glass, graded into scales of equivalent colour value
Lovibond, Joseph W. (Joseph Williams), 1835-1918, George Gill and Sons, publisher · London : George Gill and Sons, Minerva House, Warwick Lane, E.C. · leaf 165
e to orange and yellow, but could not dis- tinguish between them, calling both yellow. 3rd. That it was sensitive to blue and violet, but could not distinguish between them, calling both blue. It is evident that the method can be extended in an organised fashion to any desirable combination.… … Fig. 12. the coloured object seen by one
Color · Light · Optics
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