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  • Articles: DFG German National Licenses  (1)
  • 1880-1889  (1)
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  • Articles: DFG German National Licenses  (1)
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    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 26 (1882), S. 105-105 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the interest of solar observers I send you a caution. A first-class sample of black glass was set with a bit of white paper behind it, and exposed for an instant to the focus of a 7-inch lens. The paper was charred where an eye would be placed. A longer exposure of a few seconds made the ...
    Type of Medium: Electronic Resource
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