A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 27
ARC AND CHORD. … Describe. A graduated circle ?) What larger divisions of a circle ? What isa semicircle ? A quadrant? (Note.) A sextant? (Note.) A sign ? Anare ? (Derivation of term ?) Define a chord. (Why said to be subtended ?) DEFINriIONS. 23 FOCI OF AN ELLIPSE.
Astronomy
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