 | William Thomas Brande - 1830 - 784 pages
...may be most economically separated from large quantities of silver, by heating the finely granulated alloy in sulphuric acid : the gold remains in the...pulverulent state, and, with a little borax or other vitrifiable flux, is fused, and cast into ingots ; the sulphate of copper is easily obtained in the... | |
 | John White Webster - 1839 - 592 pages
...by heating the finely granulated alloy in S ; the gold remains '»'!"« i°uin the form of a hlnck powder, and the sulphate of silver may be decomposed...copper ; the silver is precipitated in a pulverulent slate, and, with a little borax or other verifiable flux, is fused, and cast into ingots ; the sulphate... | |
 | John White Webster - 1839 - 618 pages
...>•..,„.„„„ »i method of Mp*. large quantities of silver, by heating the finely granulated alloy in S; the gold remains " in the form of a black powder, and the sulphate of silver may be decomposed liy the action of metallic copper; the silver is precipitated in a pulverulent state, and, with a little... | |
 | William Thomas Brande - 1863 - 736 pages
...small portions of gold are separated from large quantities of silver, by heating the finely granulated alloy in sulphuric acid : the gold remains in the...may be decomposed by the action of metallic copper, which precipitates metallic silver, and forms snlphate of copper. Sulphate of silver absorbs ammonia,... | |
 | William Thomas Brande, George William Cox - 1867 - 1090 pages
...small portions of gold are separated from large quantities of silver, by heating the finely granulated alloy in sulphuric acid : the gold remains in the...may be decomposed by the action of metallic copper, which precipitates metallic silver, and forms sulphate of copper. Some of the cyanides of silver are... | |
 | 1853 - 694 pages
...may be most economically separated from large quantities of silver, by heating the finely granulated alloy in sulphuric acid ; the gold remains in the...of a black powder, and the sulphate of silver may.^ be..decQmjq6§d: by fte action of metallic copper ; the silver is" precipitated *!ul a pilverulent... | |
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Upon the large scale, small portions of gold may be most economically separated from large quantities of silver, by heating the finely granulated alloy in sulphuric acid : the gold remains in the form of a black powder, and the sulphate of silver may... 