The New Encyclopædia Britannica, Volume 16Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 46
... gold , platinum , silver ) , are much more limited in their distribution and quantity . The usefulness of a mineral to man , however , depends upon its accessibility and concentration ; therefore , minerals that are highly dispersed ...
... gold , platinum , silver ) , are much more limited in their distribution and quantity . The usefulness of a mineral to man , however , depends upon its accessibility and concentration ; therefore , minerals that are highly dispersed ...
Page 150
... gold and silver recoverable from the original ore and traces of other impurities . The gold and silver are often worth recovering , and the re- moval of other impurities to produce the pure metal can be brought about by electrolytic ...
... gold and silver recoverable from the original ore and traces of other impurities . The gold and silver are often worth recovering , and the re- moval of other impurities to produce the pure metal can be brought about by electrolytic ...
Page 215
... gold system , arrangement set up to protect international monetary reserves from the pressure of higher gold prices ; monetary gold used as reserves would sell at a fixed price and gold used as an ordinary commodity would sell at a ...
... gold system , arrangement set up to protect international monetary reserves from the pressure of higher gold prices ; monetary gold used as reserves would sell at a fixed price and gold used as an ordinary commodity would sell at a ...
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