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  • Nature Publishing Group  (1)
  • 1870-1879  (1)
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    The Microphone (1878)
    [s.l.] : Nature Publishing Group
    Nature 18 (1878), S. 540-540 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE form of microphone described by Mr. Gerald B. Francis (NATURE, vol. xviii. p. 383) is easily made and very efficient. It not only did for me all its inventor promised, but with a common tumbler inverted over it upon the sounding-board so as to prevent direct impact of sound waves upon the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/018540d0
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