An introduction to the study of colour phenomena explaining a new theory of colour based entirely on experimental facts with applications to scientific and industrial investigations (1905)
Lovibond, Joseph Williams · New York, Spon & Chamberlain · leaf 51
FIG 9CHROMATIC CIRCLE. … Lovibonds Tlicory of Colour Phenomena. 43 The yellow and blue scales were similarly constructed,taking care that their similar unit values were in colour equi-valence with the red units, the test of equivalence being, thatwlien equal units in the three scales were superimposedagainst a white light,…
Color
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