File:PSM V23 D560 The reis telephone transmitter mechanism.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:50, 18 September 2014 | 1,636 × 2,335 (465 KB) | Ineuw | Cleaned image and improved contrast | |
16:09, 30 August 2010 | 1,028 × 1,445 (193 KB) | Ineuw | {{Information |Description = The Reis telephone transmitter mechanism |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_23.djvu/560 |Date = 1883 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[Category:P |
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