The geography of the heavens, and class-book of astronomy: accompanied by a celestial atlas (1873)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, ed, Whitall, Henry, 1819-1887? Celestial planisphere · New York, Sheldon & company · leaf 306
dging of the posi-tion of the immersed portion of the oarfrom the direction of the rays D B,locates the blade of the oar at C; thusreversing the effect illustrated at183. 641. The refracting power of different transparent substancesdepends mainly upon their density. Water refracts more thanair,… … EFFECT OF REFRACTION 642. By the aid of refraction,we may see objects that areactually behind an opaque orintransparent body. Here the piece of money at A, at thebottom of the cup, would be invisible tothe behoiuc. ♦ B, if the cup was empty,as the light from the money would passfrom i to C; but…
Constellations · Stars
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