File:PSM V14 D144 The edison microphone.jpg
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Size of this preview: 800 × 451 pixels. Other resolutions: 320 × 180 pixels | 640 × 361 pixels | 1,024 × 577 pixels | 1,690 × 952 pixels.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:37, 27 January 2011 | 1,690 × 952 (165 KB) | Ineuw | {{Information |Description = The Edison microphone |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_14.djvu/144 |Date = 1878-1879 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popular Science | |
15:30, 5 August 2010 | 1,714 × 1,028 (168 KB) | Ineuw | {{Information |Description = The Edison microphone |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_14.djvu/144 |Date = 1878-1879 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popular Science |
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