 ... this operation it will be found that the results are sometimes more and sometimes less satisfactory, in consequence of small and accidental variations in the proportions employed. It happens sometimes that the chloride of silver is disposed to darken...  Journal of the Franklin Institute - Seite 2651839Vollansicht - Über dieses Buch
 | Perry Fairfax Nursey - 1839 - 508 Seiten
...the paper with salt and silver, and drying it between times, Mr. Talbot has succeeded in increasing its sensibility to the degree that is requisite for...possible, without reaching it ; so that the substance muy be in a state ready to yield to the slightest extraneous force, such as the feeble impact of the... | |
 | 1839 - 520 Seiten
...the paper with salt and silver, and drying it between times, Mr. Talbot has succeeded in increasing its sensibility to the degree that is requisite for...approach to this condition as near as possible, without reacAinffit; so that the substance may be io a state ready to yield to the slightest extraneous force,... | |
 | William Laxton - 1839 - 522 Seiten
...results ;>re sometime* more, snd sometimes less satisfactory, in consequence of small and ;i< . idriiMl variations in the proportions employed. It happens...without reaching it; so that the substance may be in a .state1 ready to yield to the slightest extraneous force, such as the feeble impact of the violet rays... | |
 | 1839 - 622 Seiten
...happens sometimes that the chloride of silver is disposed to darken of itself, without any exposure to light: this shows that the attempt to give it sensibility...force, such as the feeble impact of the violet rays whet, much attenuated. Having, therefore, prepared a number of sheets of paper with chemical proportions... | |
 | 1839 - 630 Seiten
...the chloride of silver is disposed to darken of itself, without any exposure to light: this sho>vs that the attempt to give it sensibility has been carried...slightest extraneous force, such as the feeble impact of ih« violet rays whiL much attenuated. Having, therefore, prepared a number of sheets of paper with... | |
 | 1839 - 444 Seiten
...been carried too far. " The object," says Mr. Tallmt, " is to approach to the extreme of sensibility as near as possible, without reaching it; so that...Having, therefore, prepared a number of sheets of paper, with chemical proportions slightly different from one another, let a piece be cut from each, and, having... | |
 | 1839 - 938 Seiten
...itself, without any exposure to the light — this shows that the attempt to give it sensibility has beeo carried too far. The object is, to approach to this...without reaching it; so that the substance may be in a slate ready to yield to (he slightest extraneous force, such as the feeble impact of the violet rays,... | |
 | 1840 - 516 Seiten
...happens sometimes that the chloride of silver is disposed to blacken of itself without any exposure to light. This shows that the attempt to give it sensibility...feeble impact of the violet rays when much attenuated." Another kind 'of paper exceedingly delicate may be made, according to Mr. 38 Talbot, in the following... | |
 | 1842 - 496 Seiten
...happens sometimes that the chloride of silver is disposed to blacken of itself, without any exposure to light. This shows that the attempt to give it sensibility...the slightest extraneous force, such as the feeble impart of the violet rays when much attenuated." In this process the salt of muriate of soda is acted... | |
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