Chemical News and Journal of Industrial Science, Tom 39Chemical news office., 1879 |
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Strona 7
... copper ; second , the proportion of copper ; and , third , the presence or absence of lead . To begin with the simplest case , viz . , with pyrites free from copper . The apparatus required consists of — I , a roaster ; 2 , a ...
... copper ; second , the proportion of copper ; and , third , the presence or absence of lead . To begin with the simplest case , viz . , with pyrites free from copper . The apparatus required consists of — I , a roaster ; 2 , a ...
Strona 8
... copper is then found in the residue principally as 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 ...
... copper is then found in the residue principally as 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 ...
Strona 9
... copper , and zinc . obtained this product in quantity by the action of aceton upon melted chloride of zinc at a high temperature . Normal Ethyl - oxy - butyric Acid and its Derivatives . M. Duvillier . An examination of the ethyl - oxy ...
... copper , and zinc . obtained this product in quantity by the action of aceton upon melted chloride of zinc at a high temperature . Normal Ethyl - oxy - butyric Acid and its Derivatives . M. Duvillier . An examination of the ethyl - oxy ...
Strona 10
... Copper , " by W. Semmons . " Contributions towards a History of British Meteorites , by Townshend M. Hall , F.G.S. " Notes on some Crystals of Iron , " by Amos Beardsley , F.G.S. Additional Note on Pen- withite , " by J. H. Collins ...
... Copper , " by W. Semmons . " Contributions towards a History of British Meteorites , by Townshend M. Hall , F.G.S. " Notes on some Crystals of Iron , " by Amos Beardsley , F.G.S. Additional Note on Pen- withite , " by J. H. Collins ...
Strona 15
... copper ; Mr. Holtzman , who has provided me with cerium , lanthanum , and didymium prepared by himself ; Mr. George Matthey , of the well - known metal- lurgical firm of Johnson and Matthey , who has provided me with magnesium and ...
... copper ; Mr. Holtzman , who has provided me with cerium , lanthanum , and didymium prepared by himself ; Mr. George Matthey , of the well - known metal- lurgical firm of Johnson and Matthey , who has provided me with magnesium and ...
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