Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 183
perature of the gas; andLockyer thinks he has discovered conclusive evidence, in thespectra of the sun and stars, that many of the substancesregarded as elementary are really resolved into simpler sub-stances by the intense heat of the sun; in other words, that ourso-called elements are really… … Fig. 180. These lines were first studied and mapped by Fraun-hofer, and from him they have been called Fraunhoferslines. A reduced copy of Fraunhofers map is shown in Fig. 179.A few of the most prominent of the dark solar lines aredesignated by the letters of the alphabet. The other lines…
Astronomy
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