Morse's manual of art : a self teacher in all branches of deocrative art, embracing almost every variety of painting and drawing, on china, glass, velvet, canvas, paper and wood : the secret of all glass transparencies, sketching from nature, pastel and crayon drawing, etc. : illustrated (1884)
Morse, D. D · Chicago : [D.D. Morse] · leaf 184
he colored pot metal may be painted with intermediate tints of its own principal color, or even in order to produce certain effects, may be covered on one of its surfaces with another color. Thus, a fiery red may be obtained by covering a red overlaid glass on its white surface with the yellow…
Painting · Drawing · Decoration and ornament
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.