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 210
when it is viewed from the sun, it is evident thatthe earths shadow must tend directly to that part ofthe heavens; and as the moons orbit has an inclina-tion of about five degrees with the ecliptic, and onlycrosses it in two points called its nodes, the shadowof the earth cannot fall upon the moon… … ecliptic at h, which is called its node. Then, if e f g hrepresent the earth or its shadow in four different po-sitions in its orbit, when the moon i approaches itsnode h, and the shadow of the earth is at e, it has nopart of the suns rays intercepted ; but if the earth beat f and the moon at k, a…
Physics
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
