File:Syphon recorder output.png
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Summary
| Description |
English: Recording of a telegraph message from an underwater submarine telegraph cable on paper tape by a syphon recorder from around 1900. The poor transmission quality of early telegraph cables distorted the signal, making the current pulses representing "dots" and "dashes" of the Morse code very difficult to read. |
| Date | |
| Source | Edward M. Byrn (1900) The Progress of Invention in the 19th Century, Munn and Co., New York, Sec. 4, p. 36, fig. 16 archived on Project Gutenberg |
| Author |
Edward W. Byrn |
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:25, 9 December 2013 | | 600 × 110 (11 KB) | Mumiemonstret | {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|Illustration of output from the Syphon recorder used for recording the very weak telegraph signals transmitted through the first transatlantic cables.}} |Source = '''Original p... |
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