Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 274
cated. Curves which turn sharply at the point of tangencyare preferable. In most such problems, it probably will benecessary to use a combination of two or more of the methodsdescribed below. For sun shadows, special methods can be devised which aremuch less laborious than any given here, since the… … Fig. 238 256 DESCRIPTIVE GEOMETRY XII, § 216 *.«
Geometry, Descriptive
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