Winchell, Alexander, 1824-1891 · Chicago, S.C. Griggs and company · leaf 312
represents the axis inone state of inclination. The date is the summer solsticeof the northern hemisphere. R R are parallel solar rayswhose points of tang-ency with the planets surface, as atP, determine the position of the polar circles, and thelimits N P of the polar zone; C, the central ray at… … Fig. 48.—Climatic Effect of Increased Obliquity of a Planetary Axis. N S represents the position of the axis. Then N P willrepresent the limits of the polar zone, T A* the width ofthe torrid zone, and P T, the width of the temperate zone.With an inclination of 45°, the temperate zone, in thesense…
Nebular hypothesis · Cosmogony
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