 | Perry Fairfax Nursey - 1839 - 514 páginas
...They are thenceforth unalterable even by the sun's light. The same plate may be employed for several successive trials, provided the silver be not polished through to the copper. But it is very important after each trial to remove the mercury immediately, by using the pumice powder... | |
 | Louis Jacques M. Daguerre - 1839 - 108 páginas
...preserve his sketches by means of It is necessary to state that the same plate may be employed for several successive trials, provided the silver be not polished through to the copper. But it is very important afteV each trial to remove the mercury immediately by using the pumice powder... | |
 | 1839 - 512 páginas
...They are thenceforth unalterable even by the sun's light. The same plate may be employed for several successive trials, provided the silver be not polished through to the copper. But it is very important after each trial to remove the mercury immediately, by using the pumice powder... | |
 | Jacob Bigelow - 1840 - 418 páginas
...lid with a collar of paper. It is necessary to state, that the same plate may be employed for several successive trials, provided the silver be not polished through to the copper. But it is very important, after each trial, to remove the mercury immediately, by using the pumice... | |
 | Jacob Bigelow - 1840 - 424 páginas
...lid with a collar of paper. It is necessary to state, that the same plate may be employed for several successive trials, provided the silver be not polished through to the copper. But it is very important, after each trial, to remove the mercury immediately, by using the pumice... | |
 | 1840 - 494 páginas
...lid* with a collar of paper. It is necessary to state that the same plate may be employed for several successive trials, provided the silver be not polished through to the copper. But it is very important after each trial to remove the mercury immediately, by using the pumice powder... | |
 | Encyclopaedia - 1851 - 276 páginas
...This finishes the drawing, and it only remains to preserve the silver from tarnishing and from dust. The same plate may be employed for many successive...the mercury be removed immediately by polishing with pumice-powder and oil. If this be neglected, the mercury finally adheres to the silver, and good drawings... | |
 | Robert Hunt - 1852 - 324 páginas
...pasteboard, with a glass over them, and then framed in wood. They are now unalterable by the sun's light. The same plate may be employed for many successive...the mercury be removed immediately by polishing with pumice-powder and oil. If this be neglected, the mercury finally adheres to the silver, and good drawings... | |
 | Robert Hunt - 1853 - 356 páginas
...This finishes the drawing, and it only remains to preserve the silver from tarnishing and from dust. The same plate may be employed for many successive...the mercury be removed immediately by polishing with pumice-powder and oil. If this be neglected, the mercury finally adheres to the silver, and good drawings... | |
 | Robert Hunt - 1852 - 380 páginas
...pasteboard, with a glass over them, and then framed in wood. They are now unalterable by the sun's light. The same plate may be employed for many successive...the mercury be removed immediately by polishing with pumice-powder and oil. If this be neglected, the mercury finally adheres to the silver, and good drawings... | |
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They are now unalterable by the sun's light. The same plate may be employed for many successive trials, provided the silver be not polished through to the copper. It is very important, after each trial, that the mercury be removed immediately by polishing... 
