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 39
... the powders are mixed , and in selecting those of the utmost purity , a dull neutral tint approaching to black , and not to white , will be ob * Newton's Optics . tained . The rotation of a disc coloured to correspond D 4.
... the powders are mixed , and in selecting those of the utmost purity , a dull neutral tint approaching to black , and not to white , will be ob * Newton's Optics . tained . The rotation of a disc coloured to correspond D 4.
Сторінка 40
... tint ; proving the existence of red in the blue and indigo , as well as in the violet rays . ( b . ) Seen through a certain thickness of balsam of sulphur , the red rays show a green band ; these are con- sidered necessarily , therefore ...
... tint ; proving the existence of red in the blue and indigo , as well as in the violet rays . ( b . ) Seen through a certain thickness of balsam of sulphur , the red rays show a green band ; these are con- sidered necessarily , therefore ...
Сторінка 43
... tint , never passing into white . ( 54. ) Such is the state of the discussion as to the constitu- tion of the spectrum . Whether the theory of the seven pris- matic rays of Newton are to be adopted , or the three super- posed spectra of ...
... tint , never passing into white . ( 54. ) Such is the state of the discussion as to the constitu- tion of the spectrum . Whether the theory of the seven pris- matic rays of Newton are to be adopted , or the three super- posed spectra of ...
Сторінка 60
... tint , on the point which corresponds with the least refrangible blue rays . ( Herschel . ) Its limit of action , under the most favourable circumstances , commences very NITRATE OF SILVER . 61 near the centre of the 60 RESEARCHES ON LIGHT ...
... tint , on the point which corresponds with the least refrangible blue rays . ( Herschel . ) Its limit of action , under the most favourable circumstances , commences very NITRATE OF SILVER . 61 near the centre of the 60 RESEARCHES ON LIGHT ...
Сторінка 61
... tint of the general spectrum , too , instead of brown is dark gray , passing , however , at its most refracted or positive end into a ruddy brown . ( Herschel . ) ( 83. ) Photographic Application . - Nitrate of sil- ver , although the ...
... tint of the general spectrum , too , instead of brown is dark gray , passing , however , at its most refracted or positive end into a ruddy brown . ( Herschel . ) ( 83. ) Photographic Application . - Nitrate of sil- ver , although the ...
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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