Researches on Light in Its Chemical Relations: Embracing a Consideration of All the Photographic ProcessesLongman, Brown, Green, and Longmans, 1854 - 396 стор. |
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Сторінка 57
... become necessary to the eluci- dation of the subject before us . Almost every change in the method of applying the argentiferous preparations to the surfaces employed , gives rise to some peculiarity in the action of the prismatic rays ...
... become necessary to the eluci- dation of the subject before us . Almost every change in the method of applying the argentiferous preparations to the surfaces employed , gives rise to some peculiarity in the action of the prismatic rays ...
Сторінка 59
... , at which the paper chars , the salt is decomposed . Where the heat is greatest , the silver is revived ; and immediately around it , the paper becomes a deep blue ; beyond this a pretty decided green colour results ; and beyond the green.
... , at which the paper chars , the salt is decomposed . Where the heat is greatest , the silver is revived ; and immediately around it , the paper becomes a deep blue ; beyond this a pretty decided green colour results ; and beyond the green.
Сторінка 62
... becomes at last of the same olive colour ; it must therefore be understood that the fol- lowing notices apply to the colour produced by an exposure of a few minutes only to good sunshine , and it must also be recollected that the ...
... becomes at last of the same olive colour ; it must therefore be understood that the fol- lowing notices apply to the colour produced by an exposure of a few minutes only to good sunshine , and it must also be recollected that the ...
Сторінка 64
... becomes exceedingly small . " This paper , if properly made , is very useful for all ordinary photographic purposes . For example , nothing can be more perfect than the images it gives of leaves and MR . TALBOT'S FIRST PROCESS . 65 ...
... becomes exceedingly small . " This paper , if properly made , is very useful for all ordinary photographic purposes . For example , nothing can be more perfect than the images it gives of leaves and MR . TALBOT'S FIRST PROCESS . 65 ...
Сторінка 65
... becomes again sensible to Light , and even more so than it was at first . In this way , by alternately washing the paper with salt and silver , and drying it be- tween times , I have succeeded in increasing its sensibility , to the ...
... becomes again sensible to Light , and even more so than it was at first . In this way , by alternately washing the paper with salt and silver , and drying it be- tween times , I have succeeded in increasing its sensibility , to the ...
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actinic ammonia appears Becquerel bleaching blue rays brown calotype camera obscura carbonic acid chemical action chemical change chemical rays chloride of silver chromate collodion COLLODION PROCESS colour combination copper Daguerreotype dark darkened distilled water dried Edition effect Engravings experiments exposed exposure fluid formed gallic acid germination gold green rays heat hyposulphite of soda impression influence intensity iodide of silver iodine iron least refrangible Light luminous rays mercury metallic minutes Niepce nitrate of silver nitric acid observed obtained orange oxide oxygen paper peculiar phenomena photographic picture placed plants portion Post 8vo potash potassium precipitate prepared prism prismatic spectrum produced Prussian blue quantity quinine radiations red rays refrangible rays remarkable salts of silver sensitive Sir John Herschel solar rays solution of nitrate space sun's rays sunshine surface tint tion uranium glass vapour violet rays visible vols washed yellow rays
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