Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3750Chemical news office., 1932 |
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Strona 130
... copper , silver and gold from an alloy of the three . An inter- esting method of very ancient analysis which he describes with great care , is the touchstone method for alloys . The stone itself was generally dark schist or jasper , and ...
... copper , silver and gold from an alloy of the three . An inter- esting method of very ancient analysis which he describes with great care , is the touchstone method for alloys . The stone itself was generally dark schist or jasper , and ...
Strona 131
... copper white , another observation which was ex- tremely ancient , and probably gradually became recognised as a test . He was aware that arsenic combined with sulphur to forin realgar and orpiment , and although I can- not find that he ...
... copper white , another observation which was ex- tremely ancient , and probably gradually became recognised as a test . He was aware that arsenic combined with sulphur to forin realgar and orpiment , and although I can- not find that he ...
Strona 133
... copper , lead , bismuth , arsenic , an tin , and the precipitation of nickel , zine , and cobalt , was effected as sulphides . For the acid radical we should use the lime water test of Boulduc , for CO . , the sugar of lead ( lead ...
... copper , lead , bismuth , arsenic , an tin , and the precipitation of nickel , zine , and cobalt , was effected as sulphides . For the acid radical we should use the lime water test of Boulduc , for CO . , the sugar of lead ( lead ...
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