 | Henry Enfield Roscoe - 1866 - 420 lehte
...galena (p. 210), and it can be extracted with profit from the lead prepared from this ore, even when the lead contains only two or three ounces of silver to the ton. The method thus adopted for the extraction of the silver depends upon the fact that the whole of the silver... | |
 | William James Rolfe, Joseph Anthony Gillet - 1869 - 220 lehte
...in galena, and it can be extracted with profit from the lead prepared from this ore, even when the lead contains only two or three ounces of silver to the ton. The method thus adopted for the extraction of the silver depends upon the fact that the whole of the silver... | |
 | William R. Maguire - 1890 - 460 lehte
...is run off and cast into moulds or pigs. The silver in lead is extracted by various processes. When lead contains only two or three ounces of silver to...still employed, though it is being superseded. The fusing point of an alloy of lead and silver is under that of lead, so that when lead containing silver... | |
 | Sir Henry Enfield Roscoe - 1893 - 714 lehte
...(p. 212) ; and it can be extracted with profit from the lead prepared from this ore, even when the lead contains only two or three ounces of silver to the ton. The method thus adopted for the extraction of the silver depends upon the fact that the whole of the silver... | |
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It is also contained in small quantities in galena (p. 210), and it can be extracted with profit from the lead prepared from this ore, even when the lead contains only two or three ounces of silver to the ton. The method thus adopted for the extraction... 