Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 716
Fig. 1775. ISOMETRICAL DRAWING. 699 required, and draw through the divisions radii from D meeting A B ; thenfrom the isometric centre of the circle draw radii from the divisions on A B,cutting the circumference in the points required. Second method: On the major axis of the ellipse describe a… … Fio. 1777. perpendicular to A E, which will divide the circumference of the ellipse in thesame ratio. On the right hand of the figure both methods are shown in com-bination, and the intersections of the lines give the points in the ellipse. Fig. 1776 is an isometrical projection of a bevel-wheel,…
Mechanical drawing
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