11) represent a sphere, and ABC a cone circumscribed about it, so as to touch it at the latitude of forty degrees. ... of the cone by a circle, drawn from its apex A, with the radius A B. Consequently, any portion of this parallel on the sphere w1ll beanbsp;...
Title | : | A Manual of Geographical Science |
Author | : | Matthew O'Brien, David Thomas Ansted, Julian R. Jackson, William Latham Bevan |
Publisher | : | - 1852 |
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