 | 1771 - 432 pages
...and that it forms uo part of the present invention, I need not describe it here more particularly, although it takes a much longer time to obtain a copy upon this paper than upon calotype paper, yet the tints of the copy are generally more harmonious and agreeable. On... | |
 | 1842 - 386 pages
...but the copies are positive, having the lights conformable to nature. They also represent the objects in their natural position with respect to right and...pleasing to the eye ; it requires in general from three to thirty minutes of sunshine, according to circumstances, to obtain a good copy on this sort of photographic... | |
 | 1841 - 542 pages
...but the copies are positive, having the lights conformable to nature. They also represent the objects in their natural position with respect to right and...be washed and dried, and the fixing process (which may be deferred to a subse quent day) is the same as that already mentioned. The copies are made by... | |
 | 1841 - 1316 pages
...with a weak solution of common salt, and next with a solution of nitrate of silver. Although it tnkes a much longer time to obtain a copy upon this paper,...tints appear more harmonious and pleasing to the eye j it requires in general from 3 minutes to 30 minutes of sunshine, according to circumstances, to obtain... | |
 | 1842 - 934 pages
...in the way which he originally described in a memoir read to the Royal Society in February, lS39,and which is made by washing the best writing paper, first...be washed and dried, and the fixing process (which may be deferred to a subsequent day) is the same as that already mentioned. The copies are made by... | |
 | 1842 - 886 pages
...Society in February, 1839, and which is made by washing the best writing paper, first with a weaksolution of common salt, and next with a solution of nitrate...be washed and dried, and the fixing process (which may be deferred to a subsequent day) is the same as that already mentioned. The copies are made by... | |
 | Royal Society (Great Britain) - 1843 - 538 pages
...but the copies are positive, having the lights conformable to nature. They also represent the objects in their natural position with respect to right and...pleasing to the eye ; it requires in general from 3 minutes to 30 minutes of sunshine, according to circumstances, to obtain a good copy on this sort... | |
 | Royal Society (Great Britain) - 1843 - 552 pages
...made by washing the best writing paper, first with a weak solution of common salt, and /•'.(•/ with a solution of nitrate of silver. Although it...pleasing to the eye ; it requires in general from 3 minutes to 30 minutes of sunshine, according to circumstances, to obtain a good copy on this sort... | |
 | 1846 - 636 pages
...memoir read to the Royal Society in February, 1839, and which is made by washing the best writing-paper, first, with a weak solution of common salt, and, next,...circumstances to obtain a good copy on this sort of photoirraphic paper. The copy should be washed and dried, and the fixing process (which may be deferred... | |
 | United States. Patent Office - 1848 - 840 pages
...and that it forms no •part of the present invention, I need not describe it here more particularly. Although it takes a much longer time to obtain a copy upon this paper, yet the tints of the copy are generally more harmonious and agreeable. In order to fix such positive copies,... | |
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But the author prefers to make the copies upon photographic paper prepared in the way which he originally described in a memoir read to the Royal Society, in February 1839, and which is made by washing the best writing paper, first with a weak solution... 
