The camera and the pencil, or, The heliographic art : its theory and practice ... together with its history in the United States and in Europe ... (1864)
Root, M. A. (Marcus Aurelius), 1808-1888 · Philadelphia : M.A. Root · leaf 289
PRINCIPLES OF HARMONIOUS COLORING. 267 … Divide a circle into six equal parts, numbered 1, 2, 3, 4, 5, 6, as in the annexed diagram. Let the spaces 1, 2, 3, be colored blue; 3, 4, 5, yellow; and 5, 6, 1, red. It will appear, that the space 1 is now colored purple, by the combination of red and blue, and that it is located opposite to its…
Photography · Daguerreotype
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Ioan Henrici Alstedii Scientiarum omnium encyclopædiæ : tomus primus [-quartus] ... (1649)](https://img.insideoutlibrary.com/img/200/ia-ioanhenricialste01alst-849-111.webp)
