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 169
no-convex lens at e, it willnot pass on in the rightline ah; but as it istransmitted through theglass, its course will berefracted into the line e d, approaching towajj^s theperpendicular of the convex side f g. Another rayfalling on c parallel to a e, aud equidistant from theaxis b, will be… … refracted as they approach towards b, till theyiuto the centre, and pass in a right line through diamfcer to the converging point d Wftn parallel rays fallon the flat surface of thesame figure, they willtend from the perpendi-cular f g of the convexside, and converge withthe pencil of rays fromi e…
Physics
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