Die Physiologie der Farben für die Zwecke der Kunstgewerbe
A German physiology-of-colour treatise by Ernst Wilhelm von Brücke, published in Leipzig by S. Hirzel in 1887 for applied arts and decorative designers. The pictures are plain line diagrams: a geometric figure with labelled points and a colour-spectrum circle, a prism splitting a ray into fanned rays, a numbered circle with a single radial slit, and a two-point sight-line diagram, all in black ink on pale paper, useful to a designer for reducing colour theory to simple schematic forms.
