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 14
... intensity . Mr. Robert Harrup appears to have investigated this subject with much care , and he determined the fact , that several of the salts of mercury were reduced by the Light , and not by the heat of the sun's rays . * ( 18. ) In ...
... intensity . Mr. Robert Harrup appears to have investigated this subject with much care , and he determined the fact , that several of the salts of mercury were reduced by the Light , and not by the heat of the sun's rays . * ( 18. ) In ...
Сторінка 18
... intensity of the heat which is produced by the concentration of the sun's rays in the focus of a burning - glass . Dr. Herschel was , however , led to suspect that this was not the fact , from the following circumstances : - " In a ...
... intensity of the heat which is produced by the concentration of the sun's rays in the focus of a burning - glass . Dr. Herschel was , however , led to suspect that this was not the fact , from the following circumstances : - " In a ...
Сторінка 20
... intensity was greatest at the violet end of the spectrum , and that it extended , as Ritter and Wollaston had observed , a little beyond that extremity . When he left substances exposed for a certain time to the action of each ray , he ...
... intensity was greatest at the violet end of the spectrum , and that it extended , as Ritter and Wollaston had observed , a little beyond that extremity . When he left substances exposed for a certain time to the action of each ray , he ...
Сторінка 22
... intensity . Thus it is found that red rays , or the common sunbeams passed through red glass , have very little action upon it ; yellow and green are more efficacious , but blue and violet Light produce the most decided and powerful ...
... intensity . Thus it is found that red rays , or the common sunbeams passed through red glass , have very little action upon it ; yellow and green are more efficacious , but blue and violet Light produce the most decided and powerful ...
Сторінка 31
... intensity of its action . " The substance which has succeeded best with me , and which concurs most immediately to produce the effect , is asphaltum or bitumen of Judea , prepared in the following manner : -I about half fill a wine ...
... intensity of its action . " The substance which has succeeded best with me , and which concurs most immediately to produce the effect , is asphaltum or bitumen of Judea , prepared in the following manner : -I about half fill a wine ...
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absorption actinic ammonia appears Becquerel bleaching blue rays bodies brown calorific rays calotype camera obscura carbonic acid chemical action chemical change chemical rays chloride of silver chromate colour combination copper Daguerreotype dark darkened dissolved distilled water dried effect employed evident experiments exposed exposure ferrocyanide fluid formed gallic acid germination gold green rays heat hyposulphite of soda impression influence intensity invisible iodide of silver iodine iron least refrangible Light luminous rays mercury metallic minutes Niepce nitrate of silver nitric acid observed obtained oxide oxygen paper peculiar phenomena photographic picture placed plants plate portion potash potassium precipitate prepared prism prismatic spectrum produced quantity quinine radiations red rays refrangible rays remarkable rendered salts of silver sensitive Sir John Herschel solar rays solution of nitrate space sun's rays sunshine surface tint tion uranium glass vapour vegetable violet rays visible washed yellow ray