Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 526
nd gradually increases as it recedes. Thispoint is not indicated on the figure referred to, because the shade tint ona sphere ought not to be spread over a greater portion of its surface thanis shown there. The very delicate and liardly perceptible progression ofthe shade in the iirnncdiate… … SHADING AND SHADOWS. 337 lightened as it nears the light point. In like manner all polished or light-colored curved surfaces should be treated ; the part bordering upon the ex-treme light being covered with a tint of body-color somewhat fainter thanthat used for the flat surfaces. Again, if the…
