 The brightening of pure silver at the moment of the separation of the last traces of lead, indicates the precise period at which the operation should be terminated, and the blast is then turned off, and the fire removed from the grate. The silver is now...  A Dictionary of Applied Chemistry - Page 68by Thomas Edward Thorpe - 1922Full view - About this book
 | 1860 - 542 pages
...last traces of lead, indicates the precise period at which the operation should be terminated, and the blast is then turned off, and the fire removed from the grate. The silver is now allowed to set, and as soon as it has become hardened, the wedges are removed from beneath the... | |
 | 1860 - 536 pages
...last traces of lead, indicates the precise period at which the operation should be terminated, and the blast is then turned off, and the fire removed from the grate. The silver is now allowed to set, and as soon as it has become hardened, tle wedges are removed from beneath the... | |
 | John Arthur Phillips - 1867 - 580 pages
...last traces of oxidisable lead indicates the precise period at which the operation is terminated ; and the blast is then turned off and the fire removed from the grate. The plate of silver is now allowed to set, and as soon as it has become sufficiently hardened, the wedges... | |
 | Georg Hartwig - 1871 - 570 pages
...of the last traces of lead, indicates the precise period at which the operation should be ended, and the blast is then turned off and the fire removed from the grate. Before the introduction of Pattinson's ingenious process, the separation of the silver from the lead... | |
 | Georg Hartwig - 1871 - 612 pages
...of the last traces of lead, indicates the precise period at which the operation should be ended, and the blast is then turned off and the fire removed from the grate. Before the introduction of Pattinson's ingenious process, the separation of the silver from the lead... | |
 | John Arthur Phillips - 1887 - 900 pages
...purpose. The appearance of the surface indicates the precise period at which the operation is terminated ; the blast is then turned off, and the fire removed from the grate. The plate of silver is thus allowed to set, and as soon as it has done so, the wedges, b, are removed from... | |
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