An introduction to the study of colour vision (1915)
Parsons, John Herbert, Sir, 1868-1957 · Cambridge University Press · leaf 57
, i.e. that the situation of the mixed colour coincides with that of the mass centre of two equivalent masses (1) when the two constituents can be mixed from the three chosen colours ; (2) when one can and the other cannot so be mixed ; (3) when neither can be so mixed." v. Helm- holtz1 has… … Red * ; ^Violet Purple Fig. 7. Diagram of a colour table. The position of the pure white sensation is obtained by dividing the line joining any two complementary colours according to the relative amounts of those colours required to produce white when mixed to- gether. The deviation of the curve…
Color vision
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
