 | William Nicholson - Natural history - 1819 - 394 pages
...the indium appears to be diffused through it m fine powder only. Gold remains malleable, and little altered in colour, though alloyed with a considerable...proportion ; nor is it separable either by cupellation or qtiartation. If the gold or silver be dissolved, the iridium i, left as a black powder. Tite French... | |
 | Andrew Ure - Chemistry - 1821 - 512 pages
...the iridium appears to be diffused through it in fine powder only. Gold remains malleable, and little altered in colour, though alloyed with a considerable proportion; nor is it separable either by cupcllation or quartation. If the gold or silver be dissolved, the indium is left as a black powder.... | |
 | Thomas Curtis - Aeronautics - 1829 - 856 pages
...surface of which is merely tarnished by cupellation. Gold remains malleable, and little altered in color, though alloyed with a considerable proportion ; nor...iridium is left as a black powder. The French chemists observe, that this new metal gives a red color to the triple salt of platina and sal ammoniac, is not... | |
 | Encyclopaedia Americana - 1831 - 608 pages
...to be diffused through it in fine powder only. Gold remains malleable, and little altered in color, though alloyed with a considerable proportion ; nor is it separable either by cupellatiou or quartation. Dr. Wollastou has observed, that, among the grains of crude platinum, there... | |
 | Luke Hebert - Industrial arts - 1835 - 816 pages
...the iridium appears to be diffused through it in fine powder only. Gold remains malleable and little altered in colour, though alloyed with a considerable proportion ; nor is it separable cither by cupellation or quartation. If the gold or silver be dissolved, the iridium is left as a black... | |
 | Francis Lieber, Edward Wigglesworth - Encyclopedias and dictionaries - 1835 - 608 pages
...to be diffused through it in fine powder only. Gold remains malleable, and little altered in color, though alloyed with a considerable proportion; nor is it separable either by cupellatiou or quartation. Dr. Wollaston has observed, that, among the grains of crude platinum, there... | |
 | Luke Hebert - Industrial arts - 1836 - 814 pages
...the iridium appears to be diffused through it in fine powder only. Gold remains malleable and little altered in colour, though alloyed with a considerable...dissolved, the iridium is left as a black powder. IRIS METAL ORNAMENTS. A patent was taken out a few years ago by Mr. Barton, of the Mint, for a very... | |
 | Francis Lieber - Encyclopedias and dictionaries - 1851 - 602 pages
...to be diffused through it in fine pow der only. Gold remains malleable, and little altered in color, though alloyed with a considerable proportion ; nor...it separable either by cupellation or quartation. Dr. Wollastoii has observed, that, among the grains of crude platinum, there are some scarcely distinguishable... | |
| |
... leaves a small proportion of the iridium, but much less than in the preceding instance. Silver forms with it a perfectly malleable compound, the surface of which is tarnished merely by cupellation ; yet the iridium appears to be diffused through it... 