 | Robert Hunt - 1852 - 380 Seiten
...dulled into an ochrey hue, or even to grey, but the change altogether amounts to a moderate per-centage of the total light reflected, and in short exposures...or five seconds in the sun (the effect of which is quite1 imperceptible to the eye), and when withdrawn into the shade be washed over with the ferrosesquicyanate... | |
 | Robert Hunt - 1853 - 356 Seiten
...dulled into an ochrey hue, or even to grey, but the change altogether amounts to a moderate per-ceutage of the total light reflected, and in short exposures...held for only four or five seconds in the sun (the eft'ect of which is quite imperceptible to the eye), and when withdrawn into the shade be washed over... | |
 | Robert Hunt - 1854 - 458 Seiten
...the paper, which thus becomes reduced to a simple washing over with the ammoniacitric solution. * * * If a slip of this paper be held for only four or five...considerable deposit of prussian blue takes place on the sunned part, and none whatever on the rest, so that on washing the whole with water, a pretty strong... | |
 | Robert Hunt - 1854 - 396 Seiten
...dulled into an ockrey hue, or even to grey, but the change altogether amounts to a moderate per-centage of the total light reflected, and in short exposures...five seconds in the sun (the effect of which is quite inP perceptible to the eye), and, when withdrawn into the shade, be washed over with the ferrosesquicyanate... | |
 | 1902 - 440 Seiten
...solution. * * * If a slip of this paper be held for any four or five seconds in the sun, or arc-light (the effect of which is quite imperceptible to the...of potash, a considerable deposit of prussian blue is formed on the sunned part, and none whatever on the rest, so that on washing the whole with water,... | |
 | 1906 - 714 Seiten
...dulled into an ochery hue or even to gray, but the change altogether amounts to a moderate percentage of the total light reflected and in short exposures...easily escape notice. Nevertheless, if a slip of this pai>er he held for only four or five seconds in the sun (the effect of which is quite imperceptible... | |
 | 1906 - 854 Seiten
...change altogether amounts to a moderate percentage of the total light reflected and in short c'XiK)sures is such as would easily escape notice. Nevertheless, if a slip of this pain-r l>e held for only four or five seconds in the sun (the effect of which is quite imperceptible... | |
 | Smithsonian Institution. Board of Regents - 1906 - 734 Seiten
...moderate percentage of the total light reflected and In short exposures is such as would easily esca[>e notice. Nevertheless, if a slip of this paper be held...imperceptible to the eye, and. when withdrawn into thejshade, lie washed over with the ferrosesquicyanate of potash, a considerable deposit of Prussian... | |
 | Smithsonian Institution. Board of Regents - 1906 - 710 Seiten
...change altogether amounts to a moderate liercentage of the total light reflected and in short exiiosures is such as would easily escape notice. Nevertheless, if a slip of this paper IK; held for only four or five seconds in the sun (the effect of which is quite imperceptible to the... | |
 | Smithsonian Institution. Board of Regents - 1906 - 702 Seiten
...dulled into an ochery hue or even to gray, but the change altogether amounts to a nuslerate pereentage of the total light reflected and in short exposures...with the ferrosesquicyanate of potash, a considerable dei>osit of Prussian blue takes place on the part sunned and none whatever on the rest, so that on... | |
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... of the total light reflected, and in short exposures is such as would easily escape notice. Nevertheless, if a slip of this paper be held for only four or five seconds in the sun (the effect of which is quite imperceptible to the eye), and when withdrawn... 