 | Perry Fairfax Nursey - 1839 - 508 pages
...exposure should be only for a ftw minutes. No attempts that have been made to prevent the uncoloured parts from being acted upon by light, have as yet been successful....destroyed their susceptibility of becoming coloured. When the solar rays are passed through a print, and thrown upon prepared paper, the unshaded parts... | |
 | 1839 - 520 pages
...should be only for a few minutes. No attempts that have been made to prevent the uncoloured parts fiom being acted upon by light, have as yet been successful....destroyed their susceptibility of becoming coloured. When the solar rays are passed through a print, and thrown upon prepared paper, the unshaded parts... | |
 | 1839 - 504 pages
...attempts that have been made to prevent the uncoloured parts from being acted upon by light, have ag yet been successful. They have been covered with a...destroyed their susceptibility of becoming coloured. 'When the solar rays are passed through a print, and tlirown upon prepared paper, the unshaded parts... | |
 | 1842 - 496 pages
...employed, it is not sensibly affected. " No attempts that have been made to prevent the nncolored parts of the copy or profile from being acted upon by light...has not destroyed their susceptibility of becoming colored ; and even after repeated washings, sufficient of the active part of the saline matter will... | |
 | Henry Allon - 1866 - 606 pages
...also learn the fatal fact, that ' no attempts that have been made ' to prevent the uncoloured parts of the copy or profile from being ' acted upon by light, have as yet been successful.' They had discovered but half the spell ; the pictures could not be fixed. The agency they had invoked continued... | |
 | Robert Kemp Philp - 1864 - 1126 pages
...employed, it is not sensibly affected. No attempts that have been made to [prevent the uncoloured parts of the copy or profile from being acted upon by light...have as yet been successful. They have been covered by a thin coating of fine varnish, but this has not destroyed their susceptibility of becoming coloured;... | |
 | Chambers W. and R., ltd - 1850 - 782 pages
...employed, it is not sensibly affected. No attempts that have been made to prevent the uncoloured parts of the copy or profile from being acted upon by light have as yet been successful Besides the applications of this method of copying that have just been mentioned, there are many others... | |
 | Encyclopaedia - 1851 - 276 pages
...employed, it is not sensibly affected. No attempts that have been made to prevent the uncoloured parts of the copy or profile from being acted upon by light,...have as yet been successful. They have been covered by a thin coating of fine varnish, but this has not destroyed their susceptibility of becoming coloured;... | |
 | Robert Hunt - 1852 - 324 pages
...employed, it is not sensibly affected. No attempts that have been made to prevent the uncoloured parts of the copy or profile from being acted upon by light,...have as yet been successful. They have been covered by a thin coating of fine varnish, but this has not destroyed their susceptibility of becoming coloured... | |
 | 1853 - 444 pages
...employed, it is not sensibly affected. No attempts that have been made to prevent the uncoloured parts of the copy or profile from being acted upon by light...covered with a thin coating of fine varnish, but this lias not destroyed their susceptibility of being coloured ; and even after repeated washings, enough... | |
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No attempts that have been made to prevent the uncoloured parts of the copy or profile from being acted upon by light, have as yet been successful. 
