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Title: German silver alloyed with 10-49 per cent [Go to resource]
Description: German silver alloyed with 10-49 per cent. of tungsten, prepared by Dr. Percy in 1845 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1889-164/2537 Go to resource More Like this...
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