File:PSM V03 D430 Principle of caselli telegraph.jpg

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Description Principle of Caselli telegraph
Date between 1872 and 1873
date QS:P,+1872-00-00T00:00:00Z/8,P1319,+1872-00-00T00:00:00Z/9,P1326,+1873-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 3
Author Unknown authorUnknown author
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current19:28, 26 June 2010Thumbnail for version as of 19:28, 26 June 20101,038 × 472 (36 KB)Ineuw{{Information |Description = Principle of Caselli telegraph |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_3.djvu/430 |Date = 1872-1873 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} {{GFDL-user-w|en|Wi

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