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File:Murray Shutter Telegraph 1795.png

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Murray_Shutter_Telegraph_1795.png (670 × 554 pixels, file size: 42 KB, MIME type: image/png)

Summary

Description
English: A diagram of the six shutter telegraph invented by Lord George Murray in 1795, and used by the British Admiralty to communicate from London to the English coast from then until 1816. For more about this system, see http://en.wikipedia.org/wiki/Semaphore_line#U.K. and it's references.
Date
Source From the article "Lieutenant Watson's Telegraph", Mechanics' Magazine, No. 222, published by Knight and Lacey, London, page 296. See: https://books.google.com/books?id=rNZQAAAAYAAJ&pg=PA298
Author Touchup by myself (in USA) from screenshot (in USA) from Google books of this PD (life + 70) artwork by unknown author in Mechanics' Magazine.

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inception

24 November 1827Gregorian

File history

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Date/TimeThumbnailDimensionsUserComment
current03:51, 2 May 2011Thumbnail for version as of 03:51, 2 May 2011670 × 554 (42 KB)Heliograph{{Information |Description ={{en|1=A diagram of the six shutter telegraph invented by Lord George Murray in 1795, and used by the British Admiralty to communicate from London to the English coast from then until 1816. For more about this system, see ht

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