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 28
k, and bisect it in r»jand at K 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 k, m o,E p, E Q, each equal to M c ; then M n and e p will be the radii ofthe… … Several instruments have been invented for drawing ellipses,many of them very ingeniously contrived. The best known ofthese contrivances, are those of Farcy, Wilson, and Hick—thelast of which we present in the annexed engraving. It is shownas in working order,with a pen for drawingellipses in ink.…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-403-179.webp)
