Philosophical instructor, or, Webster's elements of natural philosophy : subdivided into principles and illustrations ; intended for academies, medical schools, and the popular class-room (1824)
Eaton, Amos, 1776-1842, Webster, John, fl. 1804-1824 · Albany : Printed by Websters and Skinners ... · leaf 199
b to f, and so on of the rtst. But if the sun be placed ato, and the earth in the orbita b c d, when the earth is at a,the sun will appear in a great circle of the heavens at h ; when it is at b, the sunwill be seen at g, and so on with the other two points. Therefore, whatever regards the suns… … CHANGES OF THE SEASONS. 19- Changes of the seasons are caused by the obliqueposition of the earths axis in relation to the plane ofits orbit. The earth is supposed to be divided into two equalparts, by a great circle drawn at equal distances fromthe poles, which is called the equator : smaller…
Physics
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