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 518
ylinder (fig. 4) by means of softenedtints. The boundary of each tint being indicated in a manner preciselysimilar to that shown by fig. 5, plate LXXXIII., the first strip of tint mustcover the line of extreme shade ah, and then be softened off on each side,as shown in fig. 13. Other and… … Fig.Z. a c
