 | 1857 - 648 pagina’s
...are, pure copper, 100 parts (by weight); zinc, 17; magnesia, G; sal ammoniac, 3-60; quick lime, 1'SO ; tartar, 9. The copper is melted in a crucible, in...stirring is continued until the fusion is complete. The cruciblu is now covered, and the fusion continued for about thirty-five minutes, when it is uncovered... | |
 | William Laxton - 1858 - 522 pagina’s
...1-80; tartar, 9. The copper is melted in a crucible, in a suitable furnace; the magnesia, sal-ammoniac, lime, and tartar are then added, separately and by...degrees, in the form of powder; the whole is stirred f»r about thirty minutes to thoroughly mix the ingredients, and the zinc is then thrown on the surface,... | |
 | Leroy J. Blinn - 1866 - 216 pagina’s
...lime 1-8 parts, tartar of commerce 9 parts, are mixed as follows : The copper is first melted, then the magnesia, sal ammoniac, lime, and tartar, are...and by degrees, in the form of powder ; the whole is now briskly stirred for about half an hour, so as to mix thoroughly ; and then the zinc is added in... | |
 | Richard Moore - 1873 - 658 pagina’s
...commerce, 9 parts ; are mixed as follows : The copper is first melted, and the magnesia, sal-ammoniac, lime and tartar are then added separately, and by degrees, in the form of powder ; the whole is now briskly stirred for about Í an hour, so as to mix thoroughly ; and then the zinc is added in small... | |
 | Alfred Ely Beach - 1875 - 616 pagina’s
...commerce, 9 parts. The copper is first melted, then the magnesia, sal-ammoniac, lime, and tartar are added separately and by degrees, in the form of powder ; the whole is now briskly stirred for about half an hour, so as to mix thoroughly ; and the zinc is added in small... | |
 | 1883 - 496 pagina’s
...1-8 part; tartar of commerce, 9 parts. The copper is first melted, then the magnesia, salammoniac, lime, and tartar, are then added, separately and by degrees, in the form of powder ; the whole is now briskly stirred for about half an hour, so as to mix thoroughly ; and then the zinc is added in... | |
 | 1884 - 548 pagina’s
...commerce, nine parts; are mixed as follows: The copper is melted first, and the magnesia, sal-ammoniac, lime and tartar are then added separately, and by degrees, in the form of powder; he whole is now briskly stirred for about half an hour, so as to mix horoughly ; and then the zinc... | |
 | Frank M Lupton - 1888 - 556 pagina’s
...commerce, nine parts, are mixed as follows: The copper is melted first, and the magnesia, sal-ammoniac, lime and tartar are then added separately, and by degrees, in the form of powder; the whole is now briskly stirred for about half an hour, so as to mix thoroughly; and then the zinc is added in... | |
 | Leroy J. Blinn - 1891 - 358 pagina’s
...mixed as follows : The copper is first melted; then the magnesia, sal-ammoniac, lime, and tartar are added, separately and by degrees, in the form of powder ; the whole is now briskly stirred for about half an hour, so as to mix thoroughly; and then the zinc is added in... | |
 | L. S. F. Pinaud - 1896 - 342 pagina’s
...commerce, nine parts, are mixed as follows : The copper is first melted, and the magnesia, sal-ammoniac, lime and tartar are then added separately, and by degrees, in the form of powder ; the whole is now briskly stirred for about half an hour, so as to mix thoroughly ; and when the zinc is added in... | |
| |
Í an hour, so as to mix thoroughly ; and then the zinc is added in small grains by throwing it on the surface, and stirring till it is entirely fused : the crucible is then covered, and the fusion maintained for about 35 minutes. The surface is then... 
