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 182
J. .J/v- /■ … Chap; 5. of Natural Philofophy. 127 CHAP. V. Of the RefraBion of Light, and its Laws. DeF INlTIONIr 77VERT thing that gives a Pajfage to Light is cattd a 2776, »-^ Medium.All pellucid Bodies, * a Vacuum, are Mediums. * 2614, Whilft a Ray of Light goes out of one Medium into anotherj, it often turns…
Physics · Natural Sciences
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