Colour Vision in the Nineteenth Century: The Young-Helmholtz-Maxwell Theory

absorbing absorption actually addition analysis appeared attempted Brewster brightness centre certainly circle colour blind colour vision combinations compared complementary compound conclusion considered correct course curves Dalton described determined difficulties discussed effect equal equation example existence experiments explain fact Figure Finally Forbes give given glass Grassmann green grey Helmholtz hypothesis idea important indicate intensity interesting later light London luminance match Maxwell Maxwell's means measurements mentioned method mixing mixtures nature Newton normal noted objects observations optical orange original perception persons pigment plates position possible primary colours prism problem produced proportions purple question rays reasons reference reflected remarks represent respect retina scientific seen sensation separate showed shown side similar simply slit spectral colours spectrum Table theory thought transitions triangle understanding viewed violet wavelengths white light yellow and blue Young