December 18, 2016
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For melting gold, a strong fire is necessary, and the operation is generally performed in a forge or furnace. The following is a description of
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Having lately analyzed three specimens of ore from California, all of which were supposed by the possessors to contain gold, and finding but one of
This contains a series of tables, more or less complete, of minerals arranged according to chemical composition or to certain prominent crystallographic or physical characters.
The native elements are divided into the two distinct sections of the Metals and the Non-metals, and these are connected by the transition class of
The Silicates are in part strictly anhydrous, in part hydrous, as the zeolites and the amorphous clays, etc. Furthermore, a large number of the silicates
Fire Assay is the most common technique for analyzing precious metals was developed and refined almost to perfection before the 15th century (5). Government, mining