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 (1866)
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 26
and bisect it in r,and at r erect a perpendicular, cutting c d, or c d produced, at m ;then make g e equal to g M; J, e, i, m, wiU be the centres of thefour circles required. Through the points, j and i, draw m n, M oE p, E Q, each equal to m c ; then m n and e p will be the radii of 1the greater… … Several instruments have been invented for drawing ellipses,many of them very mgeniously contrived. The best knovra ofthese contrivances, are those of Farey, Wilson, and Hick—thelast of vNhich we present in the annexed engraving. It is shown as in working order,with a pen for di-avraigeUipses in…
Mechanical drawing
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