Moses Harris, an engraver and naturalist, published "The Natural System of Colours" in 1776. His color theories weren't perfect, but his illustrations of color wheels are pretttttttty and his descriptions rather poetic.
For example, he called the product of mixing opposing colors "a dirty unmeaning colour" and he purported that the admixture of red, blue and yellow "in equal force and in the strongest powers which by violently opposing each other and in very unequal contest are all three continually defeated, causing a total confusion and obscurity in darkness", aka black.
These poster-sized reproductions of vintage illustrations come ready to hang. Antiqued wood hanging bars at top and bottom feature a metal hanging loop already attached. A nail for hanging is also included. Measures 28" x 40"