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. (1857)
Armengaud, aîné (Jacques-Eugène), 1810-1891, Armengaud, Charles A., 1813-1893, Amouroux, Jules, Johnson, William, 1823-1864 · New York : Stringer & Townsend · leaf 199
ked, and theleg pieces are jointed to their extremities. One of the leg piecesis formed with a steel point at one end, and a pen at the other;whilst the other leg has a steel point at one end, and a lead pencilat the other. The legs are jointed to the shanks by their longi-tudinal centres, and can… … THE PRACTICAL DRAUGHTSMANS Fig. 12 is tho repre-sentation of a some-what smaller pair ofcompasses, in whichthe pen is formed inone piece with a steelpoint, which may beinverted, or a pencil-holder introduced in-stead. This is a con-venient instrument forsmall work. Another form ofcompass is…
Mechanical drawing
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