The practical draughtsman's book of industrial design and machinist's and engineer's drawing companion : forming a complete course of mechanical, engineering, and architectural drawing (1863)
Armengaud, aîné (Jacques-Eugène), 1810-1891, Armengaud, Charles A., 1813-1893, Amouroux, Jules, Johnson, William, 1823-1864 · Philadelphia : H.C. Baird · leaf 198
very small circles, of half or three quarters of an inch in radius atthe most. In the example we have selected for illustration, thecentre leg is of brass, or German silver, and is in one piece withthe milled handle. It is also providedwith a needle point. The pen is madewith a spring-tempered…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
