. Journal. old extracted from gold-silver alloys containing 20cent, of silver was not more than 1 per cent, less than tpure gold with solutions containing B-97, 5-98, 4|s2-99 grms. of bromine, but with 2-t> grms. of bromineextraction was only 77-li per cent, as against 92*2 per cfrom pure gold. With an alloy containing 30 per centsilver, the solution containing x-97 grms. of broiextracted 977 per cent, of the gold, whereas the stronsolution of chlorine (28 grms.) only dissolved UK1 per cThe comparative solvent action of chlorine and of broilon gold and gold-silver alloys is shown in the ond
. Journal. old extracted from gold-silver alloys containing 20cent, of silver was not more than 1 per cent, less than tpure gold with solutions containing B-97, 5-98, 4|s2-99 grms. of bromine, but with 2-t> grms. of bromineextraction was only 77-li per cent, as against 92*2 per cfrom pure gold. With an alloy containing 30 per centsilver, the solution containing x-97 grms. of broiextracted 977 per cent, of the gold, whereas the stronsolution of chlorine (28 grms.) only dissolved UK1 per cThe comparative solvent action of chlorine and of broilon gold and gold-silver alloys is shown in the ondiagram (see Fig.); on the whole, bromine appethe more efficient solvent.—A. S. Hold Bullion and Cyanide Precipitates ; Refining ik Oxygen Gas. T. Kirke Rose. Inst, of Mini] April 13, 1905. The results of a large number of experiments, which aset out in detail, show that base metals can lie remoafrom gold and silver bullion by the passage of a cur tof oxygen or air. losses due to volatilisation and. J, »».] JOURNAL AND PATENT LITERATURE.—Ct. X. SIM Ljgnificant, and those elm- to the slag can I ki pi topping the profess hofore the refining is complete. \,-s required are borax and nlii a, and a slue, of the lotion j(Na.,.R.:,)-r6R(>$.R.:,) appears to fulfil .mnts except that of cheapness. If 2 per cent. the borax and the siliea in the tlnx be omitted, J; becomes somewhat pasty, but it is probable that j li as nn per cent of the borax coulu be replaced I. Must of the gold in the slat can be recovered titration, but the silver cannot be obtained in thin J The greater part of the valuable metals in the slags Bred by fusion with carbon and iron, tin- Kail pper being reduced, and carrying down the gold Ilie cost of treatment bj air appears In be in by other refining processes, hut it is necessary the relative losses on the working scale. > ould appear to he very suit a hie for the treat- on .bos precipitates, fi which a portion of the been separated pre
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
