Goethe's Theory of Colours by Johann Wolfgang von Goethe
PART I.
PHYSIOLOGICAL COLOURS.
I. Effects of Light and Darkness on the Eye
II. Effects of Black and White Objects on the Eye
III. Grey Surfaces and Objects
IV. Dazzling Colourless Objects
V. Coloured Objects
VI. Coloured Shadows
VII. Faint Lights
VIII. Subjective Halos
Pathological Colours--Appendix