PhotographyJ.J. Griffin and Company, 1853 - 329 Seiten |
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Seite x
... Surface to the Plate 242 IV . To Develope the Image formed on the Plate 249 V. Fixing the Daguerreotype Image 251 • VI . Simplification of the Daguerreotype 254 CHAPTER VII . THE COLLODION PROCESS CHAPTER VIII . 259 THE USE OF ALBUMEN ...
... Surface to the Plate 242 IV . To Develope the Image formed on the Plate 249 V. Fixing the Daguerreotype Image 251 • VI . Simplification of the Daguerreotype 254 CHAPTER VII . THE COLLODION PROCESS CHAPTER VIII . 259 THE USE OF ALBUMEN ...
Seite xiii
... dark impression upon a prepared surface . This is , however , exceed- ingly doubtful , and even the Abbé Moigno , in his Répertoire , states , that M. Charles never disclosed any fact connected EARLY RESEARCHES ON THE SOLAR RAYS . 5.
... dark impression upon a prepared surface . This is , however , exceed- ingly doubtful , and even the Abbé Moigno , in his Répertoire , states , that M. Charles never disclosed any fact connected EARLY RESEARCHES ON THE SOLAR RAYS . 5.
Seite xiii
... surface , the part concealed by it remains white , and the other parts speedily become dark . For copying paintings on glass , the solution should be applied on leather ; and in this case it is more readily acted on than when paper is ...
... surface , the part concealed by it remains white , and the other parts speedily become dark . For copying paintings on glass , the solution should be applied on leather ; and in this case it is more readily acted on than when paper is ...
Seite 14
... upon the upper part of the board , and allowed to flow evenly over the surface of the picture . The descending stream clears away all the solvent that may yet adhere to the varnish . The plate is now to. 14 HISTORY OF PHOTOGRAPHY .
... upon the upper part of the board , and allowed to flow evenly over the surface of the picture . The descending stream clears away all the solvent that may yet adhere to the varnish . The plate is now to. 14 HISTORY OF PHOTOGRAPHY .
Seite 15
... surface of the prepared tablet , face towards it , and then exposed to the action of the light . In the camera obscura an exposure of from six to eight hours , varying with the intensity of light , is required ; while from four to six ...
... surface of the prepared tablet , face towards it , and then exposed to the action of the light . In the camera obscura an exposure of from six to eight hours , varying with the intensity of light , is required ; while from four to six ...
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actinic action of light albumen alcohol ammonia appear applied bath beautiful blue bromine calotype camera obscura chemical chloride chloride of silver clean cloth coating collodion Collodion processes colour copper copy cotton Crown 8vo Daguerre daguerreotype dark darkened dissolved distilled water drachms dried effect employed Engravings experiments exposed exposure fixed fluid fluid ounce formed gallic acid gold grains heat hydriodic hyposulphite of soda impression influence intensity iodide of potassium iodide of silver iodine iron lens liquid mercurial vapour mercury metal minutes muriate negative Niepce nitrate of silver nitric acid object obtained operation ounce of water oxide paper photographic photographic paper picture piece placed polished potash potassium precipitate prepared produced quantity radiations rays refracted remarkable removed rendered saturated solution sensibility sensitive sheet Sir John Herschel soaked solar solution of nitrate spectrum sufficient sunshine surface Talbot tint violet washed yellow
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Seite xiii - An Inquiry concerning the Chemical Properties that have been attributed to Light.
Seite xiii - When the shadow of any figure is thrown upon the prepared surface, the part concealed by it remains white, and the other parts speedily become dark.
Seite 54 - ... the whole with water, a pretty strong blue impression is left, demonstrating the reduction of iron in that portion of the paper to the state of protoxide. The effect in question is not, it should be observed, peculiar to the ammor.io-citrate of iron.
Seite xiii - The images formed by means of a camera obscura have been found to be too faint to produce, in any moderate time, an effect upon the nitrate of silver.
Seite 19 - It is so natural to associate the idea of labour with great complexity and elaborate detail of execution, that one is more struck at seeing the thousand florets of an Agrostis depicted with all its capillary branchlets (and so accurately, that none of all this multitude shall want its little bivalve calyx, requiring to be examined through a lens), than one is by the picture of the large and simple leaf of an oak or a chestnut.
Seite 27 - Then dip it into a vessel of water, dry it lightly with blotting-paper, and finish drying it at a fire, which will not injure it even if held pretty near : or else it may be left to dry spontaneously. All this is best done in the evening by candlelight. The paper so far prepared the author calls iodized paper, because it has a uniform pale yellow coating of iodide of silver.
Seite xiii - Nothing but a method of preventing the unshaded parts of the delineations from being coloured by exposure to the day, is wanting to render this process as useful as it is elegant.
Seite 19 - But in truth the difficulty is in both cases the same. The one of these takes no more time to execute than the other ; for the object which would take the most skilful artist days or weeks of labour to trace or to copy, is effected by the boundless powers of natural chemistry in the space of a few seconds.
Seite 55 - Nor is it altogether impossible that the peculiar ' prepared ' state superficially assumed by iron under the influence of nitric acid, first noticed by Keir, and since made the subject of experiment by M. Schonbein and myself, may depend on a change superficially operated on the iron itself into a new metallic body isomeric with iron, unoxidable by nitric acid, and which may be considered as the radical of that peroxide which exists in the salts in question, and possibly also of an isomeric protoxide.
Seite 2 - LIVES OF THE BRITISH ADMIRALS AND NAVAL HISTORY OF GREAT BRITAIN, from the Days of Caesar to the Present Time. By Dr. JOHN CAMPBELL.