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 27
tone—^wiiether crescendo or diminuendo—the greater will be tliodifference of the result from the b-ue one. From this it follows,that if a rule applies not to all, it can only apply to one propor-tion ; and also, that if it apply to a certain proportion and not toanother, it can only be correct in… … Set oflf B I, A J, and c k, equal to h c; join j 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…
Mechanical drawing
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