Science, Том 18American Association for the Advancement of Science, 1891 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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... lines on its surface and the order of spectrum in use , about 1,000 lines being necessary to resolve the sodium lines in the first spectrum . As it is often of importance in the record of observations to state the efficiency of the ...
... lines on its surface and the order of spectrum in use , about 1,000 lines being necessary to resolve the sodium lines in the first spectrum . As it is often of importance in the record of observations to state the efficiency of the ...
Стр. 232
... line in the blue which has apparently the same position as a bright line in the great nebula of the same constellation ; and Pickering finds in his photographs of the spectra of these stars dark lines corresponding to the principal lines ...
... line in the blue which has apparently the same position as a bright line in the great nebula of the same constellation ; and Pickering finds in his photographs of the spectra of these stars dark lines corresponding to the principal lines ...
Стр. 240
G , and to employ as the line of comparison the hydrogen line near G , and recently also certain lines of iron . The most minute and complete mechanical arrangements were provided for the purpose of securing the absolute rigidity of the ...
G , and to employ as the line of comparison the hydrogen line near G , and recently also certain lines of iron . The most minute and complete mechanical arrangements were provided for the purpose of securing the absolute rigidity of the ...
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