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 xiv
... embraced in this Volume , the differences being only in degree . Since this white salt of silver will not darken in the absence of Light , it was reasonable that INTRODUCTION . XV the change should be referred to the xiv INTRODUCTION.
... embraced in this Volume , the differences being only in degree . Since this white salt of silver will not darken in the absence of Light , it was reasonable that INTRODUCTION . XV the change should be referred to the xiv INTRODUCTION.
Сторінка 4
... darkened by their influence , yet these facts excited no attention ; and it was reserved for the philosophers of our own time to show , that the study of this peculiar property of the Sunbeam tends to improve our perceptions of the beau ...
... darkened by their influence , yet these facts excited no attention ; and it was reserved for the philosophers of our own time to show , that the study of this peculiar property of the Sunbeam tends to improve our perceptions of the beau ...
Сторінка 11
... darken the chloride of silver in fifteen minutes , while the red rays required twenty minutes , and the other colours various intermediate periods . The bleaching of wax by exposure to the solar rays became also the subject of ...
... darken the chloride of silver in fifteen minutes , while the red rays required twenty minutes , and the other colours various intermediate periods . The bleaching of wax by exposure to the solar rays became also the subject of ...
Сторінка 16
... darkened rapidly beyond the violet extremity of the prismatic spectrum ; in the violet ray it was less dark- ened ; still less in the blue ; below which ray the power of darkening diminished quickly . He also stated that the red ray had ...
... darkened rapidly beyond the violet extremity of the prismatic spectrum ; in the violet ray it was less dark- ened ; still less in the blue ; below which ray the power of darkening diminished quickly . He also stated that the red ray had ...
Сторінка 18
... darkening - glasses . What appeared re- markable was , that when I used some of them , I felt a sensation of heat , though I had but little Light ; while others gave me much Light , with scarce any sensation of heat . Now , as in these ...
... darkening - glasses . What appeared re- markable was , that when I used some of them , I felt a sensation of heat , though I had but little Light ; while others gave me much Light , with scarce any sensation of heat . Now , as in these ...
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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