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" Au = 199-2. This metal is found native, either pure, or alloyed with silver and tellurium. When combined with silver, it is purified by quartation ; that is, by fusing it with so much silver, that the gold does not exceed one-fourth of the mass, and then... "
A Handbook of Inorganic Chemistry: Being a New and Greatly Enlarged Edition ... - Página 256
por William Gregory - 1853 - 291 páginas
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Outlines of Chemistry: For the Use of Students

William Gregory - 1847 - 653 páginas
...shops. It would appear that the affinity of silver for sulphur is very powerful. 50. Goto. Au = 199-2. This metal is found native, either pure, or alloyed...malleable of all metals ; and it melts in a strong red or white heat. From its feeble affinities, gold does not readily tarnish, and may be heated for...
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Outlines of chemistry for the use of students

William Gregory - 1851 - 614 páginas
...native, either pure or alloyed with silver and tellurium. When combined with silver, it is purified bv quartation ; that is, by fusing it with so much silver,...powder, which, when fused, assumes the peculiar yellow color of gold. Gold is distinguished by its pure yellow color, high metallic lustre and great density....
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Dental Metallurgy: a Manual for the Use of Dental Students

Charles James Essig - 1882 - 253 páginas
...operation of parting, which consists in boiling the alloy (after rolling it into a thin plate) in strong nitric acid, which dissolves the silver and leaves the gold as a coherent sponge."* As the accuracy of the result of an assay is liable to be influenced, either by...
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Manual of Determinative Mineralogy with an Introduction on Blowpipe Analysis

George Jarvis Brush - 1898 - 312 páginas
...times its weight of pure silver, and then treated in a porcelain dish or capsule with a little warm nitric acid, which dissolves the silver and leaves the gold as a brownish-black powder or dark coherent mass. This process of separating gold from silver is called...
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Manual of Determinative Mineralogy with an Introduction on Blowpipe Analysis ...

George Jarvis Brush - 1898 - 312 páginas
...times its weight of pure silver, and then treated in a porcelain dish or capsule with a little warm nitric acid, which dissolves the silver and leaves the gold as a brownish-black powder or dark coherent mass. This process of separating gold from silver is called...
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