The practical draughtsman's book of industrial design and machinist's and engineer's companion : forming a complete course of mechanical, engineering and architectural drawing (1866)
Armengaud, M. (Jacques Eugène), 1810-1891, Armengaud, M. (Charles), 1813-1893, Amouroux, M. (Jules), Johnson, William, 1823-1846 · Philadelphia : H.C. Baird · leaf 199
es. 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 be turned between the forks, so as tobring into… … Fig- Fig. 12 is the 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 representedin tigs. 13, 14,…
