File:Thomsons mirror galvanometer, 1858. (9663806048).jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	10:25, 3 September 2013		1,250 × 1,014 (235 KB)	File Upload Bot (Magnus Manske)	Transferred from Flickr by User:Mrjohncummings

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File:Thomsons mirror galvanometer, 1858. (9663806048).jpg from Wikimedia Commons

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Galvanometer

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Image title	Sir William Thomson, Lord Kelvin, (1824-1907) was Professor of Natural Philosophy at Glasgow University, and was well known for his work in many branches of physics, including electricity. The first transatlantic telegraph cable was layed in 1858, reducing the time it took for messages to cross from days or months to hours. The success of the system relied on an instrument that could detect the tiny electrical signals that had passed so far under the sea. Thomson's galvanometer was the only instrument sensitive enough to detect reliably the first transatlantic telegraph messages. Made by J White.
Author	Science Museum
Copyright holder	Please read our licence terms. All digital images must be destroyed unless otherwise agreed in writing.
Width	3,504 px
Height	2,842 px
Bits per component	8 8 8
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop CS6 (Macintosh)
File change date and time	15:11, 28 August 2013
Exif version	2.21
Color space	Uncalibrated
Unique ID of original document	adobe:docid:photoshop:8c925472-e773-11d6-a2a8-a088d4c6a06f
Category	Electricity & Magnetism
Special instructions	Science & Society Picture Library 020 7942 4400 piclib@nmsi.ac.uk
Source	ELMC100116
Date and time of digitizing	13:17, 28 August 2013
Date metadata was last modified	16:11, 28 August 2013
Copyright status	Copyright status not set
Short title	Thomson's mirror galvanometer, 1858.
Keywords	physics; galvanometers; mirror galvanometers; Lord Kelvin; Atlantic submarine telegraph cable; J White; electric current meters; electricity; telegraphy; telecommunications; signals; Thomson, William
Country shown	United Kingdom
IIM version	2