Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 769
e lines at the edges; or a neater way, cut out theblotted part and paste a piece of paper underneath. To clean pen-and-ink drawings use bread one or two days old and not rubber. Aerial perspective, or the tones of lights and shadows according to theirdistance from the observer and the sources of… … After a Pen-and-ink Design, hy Portuny. FREE-HAND DRAWING. 753
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
