middle of theleft-hand upper space draw thetransverse and conjugate diame-ters of the ellipse, making theformer two inches and a quarterlong, the latter one inch and ahalf, which will give an ellipsewith the proportions of 2x3.Through each end of the diame-ters draw a portion of the boun-dary-line.… … It will be well to require your pupils, before theyattempt to draw the ellipse in their books, to draw iton their slates : first by the aid of a slip of paper, asdescribed on p. 112 ; then with the free hand. Observe that each of its diameters divides the el-lipse into two equal and similar parts ;…
Drawing
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