 | 1885 - 912 Seiten
...perfect would be the attack of the acid. In any case the first stage of assaying a gold alloy, say a sovereign, is to melt it with such an amount of...a button containing rather less than one-third of its weight of gold. c (Scale about one-half.) For the sake of convenience, and for the incidental advantage... | |
 | Sir William Chandler Roberts-Austen - 1914 - 472 Seiten
...for assaying silver has now been superseded by the Gay-Lussao or volumetric method. melt a portion of it with such an amount of silver as shall yield a button containing rather less than one-third of its weight of gold. For the sake of convenience, and for the incidental advantage that the solvent... | |
 | Sir William Chandler Roberts-Austen - 1914 - 468 Seiten
...gold alloy, say a sovereign, is to 1 Boizard, " Traite des Monnoies," p. 176. 1692. melt a portion of it with such an amount of silver as shall yield a button containing rather less than one-third of its weight of gold. For the sake of convenience, and for the incidental advantage that the solvent... | |
 | Sir Robert Harry Inglis Palgrave, Robert Harry Inglis Palgrave - 1901 - 824 Seiten
...gold, the leas perfect would be the attack of the acid. The first stage of assaying a gold alloy, say a sovereign, is to melt it with such an amount of...as shall yield a button containing rather less than one third of its weight of gold. For the sake of convenience and for the incidental advantage that... | |
 | Robert Harry Inglis Palgrave, Henry Higgs - 1926 - 954 Seiten
...gold, the less perfect would be the attack of the acid. The first stage of assaj-ing a gold alloy, say a sovereign, is to melt it with such an amount of...as shall yield a button containing rather less than one third of its weight of gold. For the sake of convenience and for the incidental advantage that... | |
 | Institute of Bankers (Great Britain) - 1885 - 826 Seiten
...perfect would be the attack of the acid. In any case the first stage of assaying a gold alloy, say a sovereign, is to melt it with such an amount of...a button containing rather less than one-third of its weight of gold. C (Scale about one-half.) For the sake of convenience, and for the incidental advantage... | |
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... part of the mass, as a larger proportion of gold would protect the alloy from the solvent action of the acid, and the greater the amount of gold the less perfect would be the attack of the acid. In any case the first stage of assaying a gold alloy,... 