Hints on tints and how to mix them : illustrated by one hundred and seventy-five specimens of tints : with an introductory essay on color and colors (1893)
Leidel, Henry · New York : Henry Leidel · leaf 49
Painting
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Researches in colour vision [electronic resource] : and the trichromatic theory (1913)](https://img.insideoutlibrary.com/img/200/ia-b21287739-426-0.webp)
