Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 136
At El the suns rays,when it is on the meridian,strike the surface of the earthat the point in question moreobliquely than when the earthis at Ez. Their intensity is,therefore, less in the formercase than it is in the latter;for, in the former, the rayswhose cross section is PQ,Fig. 40, are spread… … Fig. A A a 40. — Effects of obliquity of suna rays. 108 AN INTRODUCTION TO ASTRONOMY [ch. hi, 57 57. Relation of the Position of the Celestial Pole to theLatitude of the Observer. — In order to make clear theclimatic effects of certaiii additional factors, consider theapparent position of the…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
