File:PSM V19 D346 The spectrophone.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:20, 24 March 2014 | 3,050 × 1,501 (427 KB) | Ineuw | Cleaned image & improved contrast | |
04:08, 21 August 2010 | 3,059 × 1,499 (341 KB) | Ineuw | {{Information |Description = The spectrophone |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_19.djvu/346 |Date = 1881 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:Popular Science Monthly i |
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