00939cam a22002653a 4500 14725 PGUSA 20140828083320.0 050118s2005||||xxu|||||s|||||000 | eng d PGUSA eng dc QC Huygens, Christiaan, 1629-1695 Treatise on Light : In which are explained the causes of that which occurs in reflexion, and in refraction and particularly in the strange refraction of Iceland crystal [electronic resource] / Christiaan Huygens Project Gutenberg, 2005 Public domain in the USA. Electronic text Refraction, Double Wave theory of light Thompson, Silvanus P. (Silvanus Phillips), 1851-1916 Traité de la lumière. English Project Gutenberg 14725 http://www.gutenberg.org/ebooks/14725 EB 243980 243980 0 0 0 GTB GTB 2014-08-28 0 2014-08-28 00:00:00 2014-08-28 EB