Book, Oculus artificialis teledioptricus sive telescopium (The Eye Also of a Telescope or an Artificial Teledioptricus), 1702
Predating Newton’s Opticks by two years, Johann Zahn’s system was one of the last extending from the classical tradition of color theory established by Aristotle. Zahn’s color diagram takes the shape of an equilateral triangle, with black and white at opposite ends of the base and yellow, red, and blue in between. Lines connect colors on the opposite sides of the triangle, creating diamonds of mixed colors.
It is credited
Gift of Bern Dibner, Smithsonian Libraries, QC380 .Z19.
Its dimensions are
H x W (open): 35 × 46 cm (13 3/4 × 18 1/8 in.)
This object was previously on display as a part of the exhibition Saturated: The Allure and Science of Color.