Daniel Young, Young's Demonstrative Translation of Scientific Secrets
“ LANDSCAPES IN WATER-COLOURS Sketch the outlines faintly with a black-lead pencil. Then colour.Colours.—The most useful are: lake, burnt ochre, gamboge, indigo, light red, sepia, Prussian blue, sienna, and burnt umber.The gray colour is made of burnt umber, indigo, and lake; each rubbed separately in a saucer, and then mixed in a fourth saucer as to produce the exact colour—a warm gray. This is thinned for the light tints, as sky and distances. Deeper is to be used for the shadows and near parts, softening with water till the exact effect is produced. ”
