Halos and double suns are very common consequences of refraction in this quarter of the world.
"Voyages in Search of the North-West Passage" by Richard Hakluyt
He deduced from it the laws of reflection and refraction, and applied it to explain the double refraction of Iceland spar.
"Six Lectures on Light" by John Tyndall
Never had the double refraction of his mind been more clearly defined.
"Mr. Britling Sees It Through" by H. G. Wells
It is highly prized by mineralogists on account of its double refractive qualities.
"Wealth of the World's Waste Places and Oceania" by Jewett Castello Gilson
It is double refracting and has no cleavage.
"The Chemistry, Properties and Tests of Precious Stones" by John Mastin
The table below gives the necessary information as to which stones show double and which single refraction.
"A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public" by Frank Bertram Wade
Soon after, reflexion, refraction, and double refraction were accounted for on that principle.
"History of the Intellectual Development of Europe, Volume II (of 2)" by John William Draper
Arago wrote "Double Refraction" and "Polarization of Light," a note to which mentions his name as author.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3" by Various
For instance, suppose the subject of inquiry to be the cause of the double refraction of light.
"A System of Logic: Ratiocinative and Inductive" by John Stuart Mill
Fluor-spar, though cubic, sometimes exhibits weak double refraction, probably due to internal tension.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5" by Various