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 636
The angle of the cube formedby the three radii meeting in thecentre of the hexagon, may bemade to appear either an internal orexternal angle; in the one case thefaces representing the interior, andin the otlicr the exterior of a cube.Figs. 3, 4, 5, illustrate tlie application of isometrical drawing…
