Sullivan, Christine [Gordon]. [from old catalog] · New York, Cincinnati [etc.] American book company · leaf 32
9. — To draw tan-gents to an ellipse from a givenpoint without the curve. Let A (Fig. 45) be the givenpoint. From ^ as a center, witha radius equal to its distancefrom F\ the nearest focus, de-scribe an arc. From the otherfocus, 7^, with the transverse axisBC as a radius, cut the arc in Pand S^ and…
Mechanical drawing
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