New electric lamp
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Article
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1878
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Elsevier Science
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English
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Hardeninq of Copper, etc. 67 Hardening of (lopper and Copper Alloys.--Everitt gives the following recipe: Melt together and stir until thoroughly incorporated, copper, and from one to six per cent. of manganese oxide. The other ingredients for bronze or other alloys may then be added. The coplaer b