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 (1871)
Armengaud, Charles A., 1813-1893, Armengaud, Charles, 1813-1893, [from old catalog] joint author, Amouroux, Jules, [from old catalog] joint author, Johnson, William, 1823-1864. [from old catalog] · Philadelphia, H. C. Baird · leaf 202
:^SS!!$sWg^gSiiSi!JSii)iiAi^ … Fig. 32. tion with Iegard to the grooves, whatever be the position of the bar,p., and pen, s. In adjusting the instrument, it is simply necessaryto set the pen and centre legs, so that the distance of the twolatter from the former shall correspond respectively wth thesemi-transverse and…
Mechanical drawing
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