Notes on practical mechanical drawing, written for the use of the students in general engineering drawing in the University of Illinois (1907)
Wilson, Victor Tyson, 1864- [from old catalog] · State College, Pa., The author · leaf 102
isect the line, CA,and prolong the bisector, O 0^ to meet BO^ prolongedin 0^ 0 will be the center for an arc of a circlepassing through B, which will approximate the ellipse. Irregular Curves and Geometrical Drawing 93 From the point in which this arc touches the bisector, OO,draw an arc of another… … one on the other side of the minor axis, symmetrical withthe center C for the arc which goes through A. This is a method of drawing an ellipse, which, of course,more closely simulates the true curve, the nearer the ratioof the two axes is equal to one. But, in any case, it caneasily be detected as…
Mechanical drawing
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