A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 29
The parts cut offby the polar circles are mere convex segments of the earths surface. THE TROPICS AND POLAB CIRCLE. E^-n 1—s? P/ \ EC VF A IS AXJIS / \ A ; < .* Z3 ; ^ . \ / ^ \ The tropics ? Names ? Polar circles ? Names ? Zones ? Names ? (Arethere in reality any frigid zones f) Situation of… … MERIDIANS.
Astronomy
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