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Scale holder designed by Lord Kelvin

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Scale holder designed by Lord Kelvin
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This scale holder and slit is part of a reflecting galvanometer which was used in 1865-1866 to test electric currents passing through transatlantic marine cable.

Transatlantic marine cable was laid for the first time by the Atlantic Telegraph Company in 1865-1866.

As chief consultant of the Atlantic Telegraph Company, the physicist Sir William Thomson was involved in the design and construction of the first successful underwater Atlantic cable. In 1866 he was knighted for his work in physics and engineering. Later, in 1892, Lord Kelvin was made 1st Baron Kelvin of Largs.

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