Kenison, Ervin, Bradley, Harry Cyrus, 1871-1936 · New York : The Macmillan Company · leaf 74
to if or V. In certainpositions of the axis of revolution, the circular path of therevolving point will have simple projections on either H or V,or both. Let a, Fig. 96, be revolved about an axis perpendicular to 52 VIII, § 76] REVOLUTION OF A POINT 53 H. The circle in which a revolves will be… … ri \>c j !\ A i i i i 1 • ! b»i I. V U Fig. 97. pendicular to V, the circular path projects on 7as a circle,and on if as a straight line parallel to GL. 76. Revolution of a Point about an Axis Lying in a Given Plane(Fig. 98). Let us consider a point a, which is to be revolved
Geometry, Descriptive
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