Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 734
ive. To draio an Arched Bridge in Angular Perspective.—Let A and B (Fig.1802) be the plans of the piers ; on the line a p, one of the sides of the bridge,lay down the curve of the arch as it would appear in elevation, in this examplean ellipse. Divide the width of the arch as at § c 6? e/^ A, carry… … T18 PEBSPECTIYB i DRAWING. pet of the bridge above the spring of the arch. Through the station pointdraw lines parallel to the side a h and end a aoi the bridge, till they intersect
Mechanical drawing
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