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 312
p:?v^. ^. … Ghap. 17. of NaturalPhilofophy. 219 CHAP. XVIL Of catoptric Tele/copes. WE have feen that Telefcopes, made of Glaffes, are imper- 3349-fedt for two Reafons* ; and we have only confiderd that * 3221.Defedt, which follows from the Nature of Refratfiion. When we ufe Speculums inftead of Glaffes, the…
Physics · Natural Sciences
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