Elementary mechanical drawing, for school and shop (1886)
Aborn, Frank, 1845- [from old catalog] · Cincinnati, New York, Van Antwerp, Bragg & co · leaf 42
pendicular to each other. The sum of the distances of any point on thecurve from the foci is equal to the major axis ofthe ellipse. To Draw an Ellipse.—First Method. Prob. 1.—Draw an ellipse, the axes of which areJ in. and 2 in. Solution.—For the major and minor axes of therequired ellipse, draw AB… … Then, in each case eFIn this way take as eF These points, F and F, are the foci of the requiredellipse. To find a point through which an ellipsedrawn on these diameters would pass, locate any point, F, on AB,and with AE andEB as radii, de-scribe arcs fromeach of the focias centers, cut-ting each…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
