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 7
... surface of nature merely . ( 11. ) I cannot quit this part of my subject without re- ferring to some of the speculations of the talented , though credulous Boyle . I do this , not with any idea of support- ing his views , which I regard ...
... surface of nature merely . ( 11. ) I cannot quit this part of my subject without re- ferring to some of the speculations of the talented , though credulous Boyle . I do this , not with any idea of support- ing his views , which I regard ...
Сторінка 10
... surface of this earth was re- duced to silver . " The following experiments are instructive . " I precipitated a solution of silver by sal - ammoniac ; then I edulcorated and dried the precipitate , and exposed it to the beams of the ...
... surface of this earth was re- duced to silver . " The following experiments are instructive . " I precipitated a solution of silver by sal - ammoniac ; then I edulcorated and dried the precipitate , and exposed it to the beams of the ...
Сторінка 13
... surface of the charcoal . Similar tubes filled with solution of gold or of silver and fragments of charcoal were exposed to the direct rays of a very bright sun , and in less than half an hour small specks of revived gold in all its ...
... surface of the charcoal . Similar tubes filled with solution of gold or of silver and fragments of charcoal were exposed to the direct rays of a very bright sun , and in less than half an hour small specks of revived gold in all its ...
Сторінка 22
... surface , the part concealed by it re- mains white , and the other parts speedily become dark . For copying paintings on glass , the solution should be ap- plied on leather , and in this case it is more readily acted on than when paper ...
... surface , the part concealed by it re- mains white , and the other parts speedily become dark . For copying paintings on glass , the solution should be ap- plied on leather , and in this case it is more readily acted on than when paper ...
Сторінка 44
... surface observed , it assumes a beautiful silvery blue colour . A green variety of fluor spar exhibits the same ... surface , by which the light entered . He also proved that a ray of light , having once passed through such a stratum ...
... surface observed , it assumes a beautiful silvery blue colour . A green variety of fluor spar exhibits the same ... surface , by which the light entered . He also proved that a ray of light , having once passed through such a stratum ...
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actinic ammonia appears Becquerel bleaching blue rays bodies brown calotype camera obscura carbonic acid chemical action chemical change chemical rays chloride of silver chromate colour combination copper crown 8vo Daguerreotype dark darkened distilled water dried effect Engravings evident experiments exposed exposure fluid formed gallic acid germination glass gold green rays heat hyposulphite of soda impression indigo influence intensity iodide of silver iodine iron least refrangible Light luminous rays mercury metallic minutes morocco Niepce nitrate of silver nitric acid observed obtained orange oxide oxygen paper peculiar phenomena photographic picture placed plants plate portion Post 8vo potash potassium precipitate prepared prism prismatic spectrum produced quantity quinine radiations red rays refrangible rays remarkable salts of silver sensitive Sir John Herschel solar rays space sun's rays sunshine surface tint tion uranium glass vapour vegetable violet rays visible vols washed Woodcuts yellow ray