File:PSM V09 D093 Telegraph transmission and receiving.jpg

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Description Morse key and register
Date
Source Popular Science Monthly Volume 9
Author Unknown authorUnknown author
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current03:38, 13 July 2010Thumbnail for version as of 03:38, 13 July 2010935 × 503 (60 KB)Ineuw (talk | contribs){{Information |Description = Morse key and register |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_9.djvu/91 |Date = 1876 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} {{GFDL-user-w|en|Wikisource|Ineuw

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