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" At the moment I am engaged in a research with Kirchhoff which gives us sleepless nights. Kirchhoff has made a most beautiful and most unexpected discovery : he has found out the cause of the dark lines in the solar spectrum, and has been able both to... "
Journal of the Chemical Society - Page 527
by Chemical Society (Great Britain) - 1900
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The Edinburgh Review: Or Critical Journal, Volume 198

1903 - 606 pages
...fellowchemist in England : — ' At this moment I am engaged with Kirchhoff in a research which givee us sleepless nights. Kirchhoff has made a most beautiful...cause of the dark lines in the solar spectrum, and he has been able both to strengthen these lines artificially in the solar spectrum and to cause their...
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1901 - 926 pages
..."At the moment I am engaged in a research with Kirchhoff which gives us sleepless nights. Kirchhotf has made a most beautiful and most unexpected discovery;...their positions being identical with those of the Fraunhofer lines. Thus the way is pointed out by which the material composition of the sun and fixed...
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