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" It has the advantage of being worked like silver in a pure state, possessing, however, greater hardness, and being capable of a higher polish. Ten parts of aluminium and ninety parts of copper produce an alloy of a pale gold color, possessing great hardness... "
Proceedings of the Academy of Natural Sciences of Philadelphia - Side 14
af Academy of Natural Sciences of Philadelphia - 1858
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The Chemical Gazette, Or, Journal of Practical Chemistry, in All ..., Bind 14

William Francis, Henry Croft - 1856 - 500 sider
...aluminium be not too great. A twentieth part of aluminium gives copper the brilliancy and fme colour of gold, and at the same time sufficient hardness to...scratch the alloy of gold employed in coin, without any injury to its malleability. A tenth part of aluminium with copper produces an alloy of .a pale...
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The Chemical Gazette, Bind 14

1856 - 504 sider
...aluminium be not too great. A twentieth part of aluminium gives copper the brilliancy and fine colour of gold, and at the same time sufficient hardness to...scratch the alloy of gold employed in coin, without any injury to its malleability. A tenth part of aluminium with copper produces an alloy of a pale gold...
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The Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy ..., Bind 8

1857 - 604 sider
...polished. This operation has for its object to dissolve out the metals which darken the color of aluminium by their presence. Aluminium forms alloys with nearly...scratch the alloy of gold employed in coin, without impairing in the slightest degree its malleability. By an increase of the per centage of copper in...
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Titan, Bind 24

1857 - 594 sider
...aluminium be not too great. A twentieth part of aluminium gives to copper the brilliancy and fine colour of gold, and at the same time sufficient hardness to scratch the alloy of gold employed in the currency, and this without injury to its malleability. A tenth part of aluminium with copper produces...
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Proceedings of the Academy of Natural Sciences of Philadelphia, Bind 9

Academy of Natural Sciences of Philadelphia - 1858 - 280 sider
...are the most interesting. Five parts of aluminium with one hundred parts of pure silver produce ¡m alloy almost as hard as a silver coin, which contains...degree its malleability. By an increase of the per ccntago of copper in alloys of aluminium the alloy i? rendered brittle, showing that the metal must...
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American Journal of Pharmacy, Bind 29

1857 - 604 sider
...alloy of a pale gold color, possessing great hardness and considerable malleability ; its hardnqps is greater than that of bronze, in the proportion...explains the peculiar properties ascribed to it by M. Regnanlt in his investigation on the physical properties of the aluminium prepared by M. Deville, exhibited...
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