Mathematical elements of natural philosophy, confirm'd by experiments : or, An introduction to Sir Isaac Newton's philosophy (1747)
Gravesande, Willem Jacob 's, 1688-1742, Desaguliers, J. T. (John Theophilus), 1683-1744, tr, Adams, John, 1735-1826, former owner. BRL, John Adams Library (Boston Public Library) BRL · London : Printed for W. Innys, T. Longman and T. Shewell, C. Hitch ..., and M. Senex ... · leaf 250
paint Objeds upon a whitfPlane ; for all the Points of an enlightend remote Body, fromwhich the Rays come upon a convex Lenfe, have their FociKi * 3011, behind the Lenfe *, the Foci of diftant Objeds, though not exadl- ly, are fenfibly at the fame Diflance from the Lenfe; thofe Objedl;by thefe Foci… … 99 ^li^s-
Physics · Natural Sciences
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