Haswell's engineers' and mechanics' pocket-book .. (1844)
Haswell, Chas. H. (Charles Haynes), 1809-1907 · New York, Harper & brothers · leaf 60
the radius thereof. Take the point H for the cen-tre of another circle, and H B for the radius ; this circle will contain the hne A B sixtimes. From the point 7, with the radius 7 B, a circle drawn will contain A B seventimes. From the point H, with the interval H 2, describe the arc 2 8 ; and from… … To describe an Elliptic Arch on the Conjugate Diameter—Jig. 15. Rule.—Draw the diameter A B, and in the middle at k, erect the perpendiculark 0, equal to the height of the arch ; divide the perpendicular k o into two equal partsat e; continue the hne A B on both sides at pleasure, and from the…
Engineering · Mechanical engineering
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