File:PSM V14 D142 Components of edison acoustic invention.jpg
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current | 15:28, 5 August 2010 | 1,832 × 1,501 (331 KB) | Ineuw | {{Information |Description = _Components of Edison's acoustic invention |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_14.djvu/142 |Date = 1878-1879 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Cate |
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