rst strata, as E F, it is slightly bent Refractiondownward, and as the air becomes more and more dense, its increases al- /> ,. , titudes. retracting power becomes greater and greater, which moreand more bends the ray. But the direction of the ray, atthe point where it meets the eye of the… … 26 ASTRONOMY. Chap. hi. ward, therefore, as we may see by inspecting the figure, thealtitude of all the heavenly bodies is increased by refraction. This shows that all the altitudes, taken as described inArt. 33, must be apparent altitudes — greater than true alti-tudes — and the resulting…
Astronomy
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