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Title: Alloy of 2 copper to 1 tin, making "speculum" metal [Go to resource]
Description: Alloy of 2 copper to 1 tin, making "speculum" metal License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1889-164/1047 Go to resource More Like this...
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