Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 207
TIVE GEOMETRY [VIII, § 164 164. The Hyperbolic Paraboloid. Thb surface is generatedby a line that slides along two straight directrices not in thesame plane, and remains parallel to a plane director. It isrepresented in Fig. 177, as limited by its directrices, the linesab and cd. The plane H is the… … 1-e, 2-/, 3-g, etc., are elements of the surface. It will be evidentthat if any two lines are divided into the same number of equalparts, and if the points thus determined are connected in order,the lines thus determined will be parallel to some plane. Hencethese lines will be elements of an…
Geometry, Descriptive
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