... Owing to this bending of the rays oflight the angles of refraction and incidence are never equal... 
Henry H. Snelling 「The History and Practice of the Art of Photography」
...As for the matter of refraction...
Various 「Astounding Stories of Super-Science January 1931」
...If you will place a glass cube or other form in the air, you will have no difficulty in measuring the refraction of the light passing through it...
Various 「Astounding Stories of Super-Science January 1931」
...There is nothing in the story that would prevent the heaviside layer from having a coefficient of refraction identical with that of air...
Various 「Astounding Stories of Super-Science January 1931」
...The sun remains visible for sometime after it has actually descended below the horizon, dueto refraction...
Various 「Astounding Stories, May, 1931」
...If there was a denser substance than airsurrounding the earth the refraction would be much greater...
Various 「Astounding Stories, May, 1931」
...Light rays passing around it would render it invisible, yetwould make the beholding eye seem to see in a straight line as usual,disregarding refraction...
Arthur J. Burks 「Lords of the Stratosphere」
...An instrument like this, speciallydesigned for zenith stars, is capable of greater rigidity than a more universalinstrument; and there is no trouble with refraction in the zenith...
George Forbes 「History of Astronomy」
...It isbent by refraction from the path it originally pursued, and is compelledto follow a different path...
Robert Stawell Ball 「The Story of the Heavens」
...The properties of reflection as well as of refraction have been enlistedinto the service of the astronomical observer...
Richard A. Proctor 「Half-hours with the Telescope」
...Endeavoured to find the law of refraction of light fromVitellio's measurements, but failed...
Oliver Lodge 「Pioneers of Science」
...Atmospheric refraction made horizon observations useless for thedelicacy of his purpose, so he chose stars near the zenith, particularlyone—γ Draconis...
Oliver Lodge 「Pioneers of Science」
...In it are results showing the laws of refraction, with tablesof its amount, the maximum value of aberration, and other constants...
George Forbes 「History of Astronomy」
...The true setting being 3·45, and the apparent about 5 minutes later, thedifference being caused by refraction...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
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