A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 392
he goat. £? Aquarius, the water-bearer. X Pisces, the fishes. THE CHANGE OF SEASONS. 387 When the Sun is vertical, or directly overhead, its heat ismost intense ; and the less its rays deviate from a verticalline in striking the surface, the more heat they impart to it.The angle at which the Suns… … At the vernal equinox (March 21st), the solar rays fall at the same angleon the northern hemisphere as on the southern, and it is spring in theformer, autumn in the latter. Half the surface, from pole to pole, is illu-mined at a time, and day and night are of equal length all over the globe. As the…
Physics
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