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 5
... gold , and to distil the Elixir Vitæ , became the guiding lights to modern science . In 1556 it was noticed that horn silver ( chloride of silver fused ) was blackened by the sun's rays . This and other peculiar influences which the ...
... gold , and to distil the Elixir Vitæ , became the guiding lights to modern science . In 1556 it was noticed that horn silver ( chloride of silver fused ) was blackened by the sun's rays . This and other peculiar influences which the ...
Сторінка 6
... Gold differs from silver in nothing but in having the globules of the mercury , whereof it consists , penetrated through and through , and being more fully saturated with the sulphureous principle of the rays of Light . " " The Light of ...
... Gold differs from silver in nothing but in having the globules of the mercury , whereof it consists , penetrated through and through , and being more fully saturated with the sulphureous principle of the rays of Light . " " The Light of ...
Сторінка 10
... precipitated into horn silver . " of Scheele continued his experiments on the chloride of gold , and some of the salts of manganese , obtaining similar results . SCHEELE'S EXPERIMENTS . 11 Again , Scheele writes , " 10 RESEARCHES ON LIGHT .
... precipitated into horn silver . " of Scheele continued his experiments on the chloride of gold , and some of the salts of manganese , obtaining similar results . SCHEELE'S EXPERIMENTS . 11 Again , Scheele writes , " 10 RESEARCHES ON LIGHT .
Сторінка 12
... gold and silver might be melted by the heat - invisible to sight- which exists in the air at the distance of more than an inch above the point of the flame of a wax candle . He then proceeded to examine what would be the effect of this ...
... gold and silver might be melted by the heat - invisible to sight- which exists in the air at the distance of more than an inch above the point of the flame of a wax candle . He then proceeded to examine what would be the effect of this ...
Сторінка 13
... gold : those which were exposed to the strong Light of the sun gradually changed colour , and in a few hours acquired a fine purple hue , whilst those pre- served in darkness remained unchanged . It was also found , that the ...
... gold : those which were exposed to the strong Light of the sun gradually changed colour , and in a few hours acquired a fine purple hue , whilst those pre- served in darkness remained unchanged . It was also found , that 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