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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be held for only four or five seconds in the sun (the effect of which is quite imperceptible to the eye), and when withdrawn... "
The Annals of Electricity Magnetism and Chemistry and Guardian of ... - Seite 401
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A Manual of Photography

Robert Hunt - 1852 - 321 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and in short exposures...or five seconds in the sun (the effect of which is quite1 imperceptible to the eye), and when withdrawn into the shade be washed over with the ferrosesquicyanate...
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Photography

Robert Hunt - 1853 - 329 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for only four or five seconds in the sun (the eft'ect of which is quite imperceptible to the eye), and when withdrawn into the shade be washed over...
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Researches on Light in Its Chemical Relations: Embracing a Consideration of ...

Robert Hunt - 1854 - 396 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...
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A Manual of Photography

Robert Hunt - 1854 - 361 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and in short exposures...five seconds in the sun (the effect of which is quite inP perceptible to the eye), and, when withdrawn into the shade, be washed over with the ferrosesquicyanate...
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The Journal of Tuberculosis: A Quarterly Magazine Devoted to the ..., Band 4

1902
...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,...
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Annual Report of the Board of Regents of the Smithsonian Institution, Teil 1

Smithsonian Institution. Board of Regents - 1906
...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...
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Congressional Serial Set

1906
...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...
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1906
...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...
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1906
...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...
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1906
...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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