Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 142
Fig. 170. through the center 0 draw CD and EF at right angles to theisometrical square. The points CD, EF, and GH will be points in the curveof the projected isometrical circle, which will be an ellipse.The ellipse may be drawn sufficiently accurate as follows:With center B and radius BC describe…
