Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 26
One Set Spring Bows 3! inches long, consisting ofpen, pencil and spacer. … 2 A MANUAL OF MECHANICAL DRAWING One Drawing Pen, 4^ or 5 inches long. One Triangular Scale 12 inches long, with divisionsin twelfths, those coated with white celluloid being thebest. J-
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
