Report to the Science and Art Department of the Committee of Council on Education on the action of light on water colours : presented to both Houses of Parliament by command of Her Majesty (1888)
Russell, William James, Abney, William de Wiveleslie, Sir, 1843-1920, Great Britain. Department of Science and Art · London : Printed for H.M.S.O. by Eyre and Spottiswoode · leaf 22
18 Fig. VII. … The difference between the lieiglits of the three curves and the line which would occupy a horizontal position at 100 on the vertical scale had the diagram been continued up and which represents the intensity of the different colours forming the original white light before passing through tl'e…
Watercolor painting · Light
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
