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 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, will be the centres of thefour circles required. Through the points, j and i, draw M n, m o,e p, e q, each equal to w c ; then w n and e f will be the radii ofthe greater… … Several instruments have been invented for drawing ellipses,many of them very ingeniously contrived. The best known ofthese contrivances, are those of Farey, Wilson, and Hick—thelast of which we present in the annexed engraving. It is shown as in working order,with a pen for drawingellipses in ink.…
Mechanical drawing
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