File:Construction-pruss-opt-tele.png

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Summary

Description Construction of prussian optical telegraph
Date circa 1835
date QS:P,+1835-00-00T00:00:00Z/9,P1480,Q5727902
Source Hermann Kellenbenz: Die historische Bedeutung der Telegraphenstation in Köln-Flittard. In: Die Telegraphenstation Köln-Flittard. Eine kleine Geschichte der Nachrichtentechnik. Köln, 1973
Author Unknown authorUnknown author

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Captions

Schematic of a Prussian optical telegraph (or semaphore) tower, c. 1835

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429 pixel

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current19:13, 7 January 2007Thumbnail for version as of 19:13, 7 January 2007429 × 1,021 (57 KB)wikimediacommons>Superbass

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