The Telegraph
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Scan day: 08 February 2014 UTC
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Description: An assortment of telegraph instrument images compiled from several early physics apparatus collections by Professor Thomas Greenslade Jr. of Kenyon College.
If you are British, you know that the telegraph was invented by Charles Wheatstone and Charles Cooke in 1836-37, An example of this form of Needle Telegraph is shown at the right; it is at Glasgow University and was made by George Mason & Co. of Glasgow. In some early instruments a number of wires were used to energize coils which pointed a compass needle toward different letters. In the single-needle model the needle deflects right and/or left, giving the equivalent of the familar dots and dashes in the American Morse coad. Under each letter on the face of the instrument can be seen the deflections indicating each letter.
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| Page title: | Telegraph |
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| NS | Name Servers: NS1.KENYON.EDU 138.28.1.2 NS2.KENYON.EDU 138.28.1.3 |
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| Date | activated: 26-Feb-1990 last updated: 02-Jul-2013 expires: 31-Jul-2014 |