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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 164

An illustration from Mathematical elements of natural philosophy, confirm'd by experiments : or, An introduction to Sir Isaac Newton's philosophy, 1747, leaf 164
onding Lines, paffing through S ; r/ is parall(to bSB, for the Sides S^, ba, of the Triangle S^^ are bifefted iI and r. So likewife ^/ is parallel to cSC ; and il is parallel to iSD ; and i\ * 2714. of the others. But as bS is equal to Sa *, rl will be equal to la, or/i2^j-[ When the Direftion of… … Chap. 2. of Natural Philofophy. iiq reftion of the Rays be le parallel to CS ; if they be dire(5ted along DSand //, the Tail muft be direfted along /. If this be every where ob-fervd, S A will always be the reflected Ray. Hence it follows, that the Ray reflefted along SA remains fixd, when 2718.the…

Physics · Natural Sciences

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