Publisher's Synopsis
Excerpt from Assaying, Vol. 1 of 3: In Three Parts
IN the assay of bullion, as in that of ore, the first step is to Obtain a correct sample, and for this reason it is desirable that the bars of ingots should be made in the establishment in which they are assayed; it is not Often that an assayer will place his stamp on a bar without knowing to a certainty that the bar is what it purports to be. Moreover, the best sample is one that is taken from the molten metal, though this is not practised in the case of gold bullion, and it Often happens that a lot of silver lead in bars, which in this country is called base bullion, ' must be sampled without melting for the purpose. Silver bullion is sampled when melted, before casting. Silver lead is so sampled when practicable. Gold bullion, or base bullion in bars. Is sampled by chipping or boring.
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