Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 156
\---\: ...1^... -f-m j m; \\r/ % Fig. 137 i 140 DESCRIPTIVE GEOMETRY [VII. § 127 III. NtTMEROUS Centers (Fig. 138). The major and minoraxes are given. The first step is to locate the foci, / and /(§ 123). Next locate a number of points, a, b, c, etc., which areknown to lie on a true ellipse (§ 124,…
Geometry, Descriptive
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