An abridgment of Smith's Illustrated astronomy (1850)
Smith, Asa · New York, Cady & Burgess · leaf 84
l refraction ? A. It is the deviation of the rays of light in theirpassage through the atmosphere. Q. What is the cause of this refraction? A. It is caused by the increase of the densityof the atmosphere towards the earth. Q. In what part of the heavens is the light of a body mostrefracted ?A. In… … THE PLANETS INCREASE OR DECREASE >N PRO =PORTION TO THE SPUARE OF THEIR DISTANCES FROM THE SUN ,^r5rt^~ *RCER THAN A
Astronomy, Juvenile and popular
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