A new elucidation of colours, original, prismatic, and material : showing their concordance in three primitives, yellow, red, and blue, and the means of producing, measuring, and mixing them : with some observations on the accuracy of Sir Isaac Newton (1809)
Sowerby, James, 1757-1822 · London : Printed by Richard Taylor and Co. · leaf 70
Oft I idol Puhl^tiil hj .T.i S.meH,,, /.„„.h;, (^//irc/n^c(^yca/t:/?. 6^ … Octjjgo,. AJ<7ijf>;! ^r^-^C±l
Newton, Isaac, Sir, 1642-1727 · Color · Painting -- Technique
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.