Chemical News and Journal of Industrial Science, Tom 39Chemical news office., 1879 |
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Strona 7
... sulphides are rich in the precious metals or not , but requires variation according to - First , the presence or absence of copper ; second , the proportion of copper ; and , third , the presence or absence of lead . To begin with the ...
... sulphides are rich in the precious metals or not , but requires variation according to - First , the presence or absence of copper ; second , the proportion of copper ; and , third , the presence or absence of lead . To begin with the ...
Strona 8
... sulphide . This residue is roasted at a dull red heat , and the copper is extracted by treatment with condenser liquor and crystallisation , as described below , the gold and silver being obtained from the residue as before . Ores or ...
... sulphide . This residue is roasted at a dull red heat , and the copper is extracted by treatment with condenser liquor and crystallisation , as described below , the gold and silver being obtained from the residue as before . Ores or ...
Strona 18
... sulphide , solution in hydrochloric acid , re - precipita- tion as caibonate and estimation as proto - sesquioxide , was 31.50 per cent , instead of 34'66 , the theoretical amount . The manganese percentage determined volumetrically by ...
... sulphide , solution in hydrochloric acid , re - precipita- tion as caibonate and estimation as proto - sesquioxide , was 31.50 per cent , instead of 34'66 , the theoretical amount . The manganese percentage determined volumetrically by ...
Strona 23
... sulphide , petroleum , and a mixture of an alcoholic extract of tobacco , with bi- sulphide of carbon . Wine - Testing and Chemical Analysis . - Drs . E. Mach and Patele . - The authors show that wines on Lime Magnesia Phosph . acid ...
... sulphide , petroleum , and a mixture of an alcoholic extract of tobacco , with bi- sulphide of carbon . Wine - Testing and Chemical Analysis . - Drs . E. Mach and Patele . - The authors show that wines on Lime Magnesia Phosph . acid ...
Strona 25
... sulphides , & c . , are converted into sulphates , and the ferrocyanide into ferri- cyanide ; the solution , after being acidified and freed as much as possible from excess of chlorine by warming and agitating , is ready for titrating ...
... sulphides , & c . , are converted into sulphates , and the ferrocyanide into ferri- cyanide ; the solution , after being acidified and freed as much as possible from excess of chlorine by warming and agitating , is ready for titrating ...
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