Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 64
and B draw lines to l, 2, 3, etc.; where these lines cut those drawn from A to E D will be points throughwhich the curve can be drawn. Plate 10.—The purpose of this plate is to show howthe hyperbola is derived from the cone, and the methodof procedure is exactly the same as explained in Plate8 for… … 60 6o A MANUAL OF MECHANICAL DRAWING. Plate ii. The Parabola. Fig. 14.—The length A B and breadth C D beinggiven, to draw a parabola: Draw A B to the given length and produce beyondA and B, draw C D perpendicular to A B through B,making C B and B D equal to half the given breadth.Bisect the…
Mechanical drawing
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