Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 68
indefinite lines a, b, c, d, etc.,perpendicular to J K, and parallel with J K drawL M. With the intersection of lines g and L M ascentre and radius equal to O C draw semi-circle iM 4, and subdivide into equal parts as i, 2,M-3-^, corresponding with points i, 2, 3, etc.From these points and parallel… … 63 64 A MANUAL OF MECHANICAL DRAWING. Plate 13.—To draw an ellipse when the long andshort diameters are given: Fig. 17.—Draw the concentric circles A B C D andE F G H equal, respectively, to the long and shortdiameters. Divide these circles into any number ofequal parts, and draw diameters as I M,…
Mechanical drawing
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