Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 43
anaxis. If a point be revolved about an axis,its locus will be in a plane perpendicular tothe axis. X is this plane, and HX^ its hori- zontal trace, is perpendicular to B^. Point a^in revolving, will describe a circle with ah asa radius. The points a and a, in which thiscircle pierces H, are the… … Fig. 71
Geometry, Descriptive
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