Colour Wheels, Charts, and Tables Through History

Georg Christoph Lichtenberg’s representation of the three-sided color graph developed by the astronomer and mapmaker Tobias Mayer.
Johann Heinrich Lambert’s three-dimensional adaptation of Tobias Mayer’s triangle.

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From the fascinating article by The Public Domain Review: “Colour Wheels, Charts, and Tables Through History” 
https://publicdomainreview.org/collections/colour-wheels-charts-and-tables-through-history/

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