 The following method will be found to answer that purpose, and its simplicity is such as to require no particular care or management on the part of the workmen : — Take of impure copper — ... — . 100 parts ; Copper scales « 10 parts ; Ground bottle...  The Year-book of Facts in Science and Art - Page 591840Full view - About this book
 | 1771 - 428 pages
...will be found to answer that purpose, and its simplicity is such as to require no particular care or management on the part of the workmen : — Take of...the impurities contained in the copper, consisting, as we have seen, of iron, lead, arsenic, &c. combine with the oxygen, contained in the copper scales,... | |
 | 1841 - 488 pages
...whole together in a covered crucible, and keep the copper in a state of fusion for twenty minutes, at the end of which time it will be found at the bottom...impurity of the copper to be operated on. But the proportion I have here given, will be found to answer very well for the average kind of English copper.... | |
 | Perry Fairfax Nursey - 1839 - 514 pages
...will be found to answer that purpose, and its simplicity is such as to require no particular care or management on the part of the workmen: — Take of...the impurities contained in the copper, consisting, as we have seen, of iron, lead, arsenic, &c., combine with the oxygen contained in the copper scales,... | |
 | 1839 - 512 pages
...that purpose, and its simplicity is such as to require no particular care or management on the part ot the workmen: — Take of impure copper. ... 100 parts...the impurities contained in the copper, consisting, as we have seen, of iron, lead, arsenic, &c., combine with the oxygen contained in the copper scales,... | |
 | 1840 - 416 pages
...Ground bottle glass or any other flux. 10 parts ; * From the Traraactions of the Society of Artt, Sfc. heat the whole together in a covered crucible, and...the impurities contained in the copper, consisting, as we have seen, of iron, lead, arsenic, &c., combine with the oxygen, contained in the copper scales,... | |
 | 1840 - 812 pages
...Ground bottle glass or any other flax. 10 parts ; * From the Transactions of the Society of Arts, Sfe. heat the whole together in a covered crucible, and...crucible perfectly pure. The quantity of copper scales muet vary in proportion to the supposed impurity of the copper to be operated on ; but the proportions... | |
 | Andrew Ure - 1845 - 312 pages
...Society of Arts for this invention, says that after the copper has been kept in fusion for half an hour, it will be found at the bottom of the crucible perfectly pure ; while the iron, lead, arsenic, &c., with which this metal is usually contaminated, will be oxidized... | |
 | 1853 - 690 pages
...Society of Arts, for this invention, says that after the copper has been kept in fusion for half an hour, it will be found at the bottom of the crucible, perfectly pure, while the iron, lead, arsenic, &c.. &c., with which this metal is usually contaminated, will be oxidized... | |
 | Robert H. Lamborn - 1860 - 254 pages
...ground bottle glass, or other similar flux. After the copper has been kept in fusion for half an hour, it will be found at the bottom of the crucible perfectly pure, while the iron, lead, arsenic, &c., with which it may have been contaminated, will be oxidised by the... | |
 | James Larkin - 1866 - 336 pages
...of Arts, for this invention, says that, after the copper has been kept in fusion for half an hour, it will be found at the bottom of the crucible, perfectly pure, while the iron, lead, arsenic, &c., &c., with which this metal is usually contaminated, will be oxidized... | |
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