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The photographic news
- Bandzählung
- 12.1868
- Erscheinungsdatum
- 1868
- Sprache
- Englisch
- Signatur
- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- SLUB Dresden
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- Public Domain Mark 1.0
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- urn:nbn:de:bsz:14-db-id1780948042-186800009
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- http://digital.slub-dresden.de/id1780948042-18680000
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- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
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- Parlamentsperiode
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- Bandzählung
- No. 500, April 3, 1868
- Digitalisat
- SLUB Dresden
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Zeitschrift
The photographic news
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Band
Band 12.1868
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- Titelblatt Titelblatt I
- Kapitel Preface III
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- Register The Index To Volume XII 619
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Band
Band 12.1868
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- Titel
- The photographic news
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April 3, 1868.] THE PHOTOGRAPHIC NEWS. 159 “through the pores,” instead of through “the convivial channel of the throttle,” makes a man “ muddled and moloncholy." I don’t think that the vapours of ether, acetic acid, cyanide, &c., taken through the pores, can, under the best of circumstances, have a very elevating effect, and it must be worth a little effort to avoid them. From the diseases of the photographer to the disorders of his nitrate bath is an easy step. Daring the seventeen years the collodion process has been before the public, the nitrate bath and its troubles have been a prolific theme for discussion. Numerous have been the remedies proposed, and enthusiastic the supporters of each ; but, alas! no uni versal panacea has yet been discovered. Addition of the oxide of silver, followed by an infinitesimal dose of nitric acid ; neutralizing and sunning ; boiling ; freezing ; pre cipitating as carbonate, and redissolving in nitric acid ; dosing with cyanide, have each in turn been regarded as the certain cure, and each remedy doubtless has its especial value; but the nitrate bath is no more amenable to the action of a universal panacea than is the constitution of man. Within the last month or two, three novel modes of dealing with the nitrate bath have been brought before photographers. Mr. Cherrill proposes to save trouble, if not to prevent disease, by using common water in place of dis tilled water. Capital advice, I should think, when good distilled water cannot be had, inasmuch as the photo grapher will begin with common water under the conviction that it contains impurities to be eliminated, whereas he often fancies that distilled water must be pure, and that it requires neither testing nor treatment of any kind, a fancy which often involves disappointment. My friend Rejlander’s remedy of keeping his bath in daylight, whenever it is out of use, seems an excellent notion. If sunning occasion ally be good, to throw down organic impurities which have accumulated, the constant exposure to daylight, to throw down these impurities as fast as they accumulate, seems a very rational proceeding. Whether any other troubles will be induced by this mode of procedure remains to ba ascer tained by experience. The method of curing the bath of fog caused by similar accumulations, to which Mr. Johnson has called attention, seems to be one of the most simple of all the remedies ; but still we shall require the record of expe rience before an absolute decision is made in favour of the use of a permanganate. I have heard in more than one instance that whilst fog is dismissed, pinholes are induced, by this treatment. Is this so ? Shall we ever dispense with the nitrate bath ? It is clear that it can be done in the preparation of dry plates. I was glad to see Mr. Bolton’s interesting article, again calling attention to the use of collodio-bromide of silver, in your columns last week. My essays with the process have not been extensive, but have convinced me of its value ; and the plates prepared by it, sent out by the Liverpool Company, are wonderfully excellent. If such perfect dry plates can bo prepared without the nitrate, it will be strange if we do not eventually succeed in superseding the wet process by a better and simpler process, in which all the sensitive agents are held in one vehicle like collodion. I have often wondered that a collodion containing iodide and bromide of silver, merely requiring immersion in a dilute silver solution to supply free nitrate, has never been brought into use. The necessity or desirability of some means of rewarding inventors who may give their inventions to the public has often been discussed, but, unfortunately, no available plan has yet been devised. I was forcibly reminded of the im portance of the subject the other day whilst reading the letter of Mr. Henderson in your columns, in which he stated that, incidentally to the working out of a new photographic enamel process, he had made certain other valuable dis coveries, amongst which were, a permanent printing process without salts of silver, a new intensifying process, &c. The uncertainty and costliness of the patent system form a barrier to this mode of protection, and although Mr. Hender ¬ son would willingly publish some portions of his discovery for the benefit of photographers, he could not do so without publishing the secret of that part of which he wishes to make commercial use in order to reimburse himself for time and money expended in working it out. The necessity, under such circumstances, of preserving secret processes which might bo valuable in the daily practice of the photo grapher is much to be deplored, but at present I do not see any remedy. I am glad to learn that the Photographic Society is about to adopt the system of distributing presentation prints, and that plenty of volunteers were found willing to provide express subjects for distribution. Mr. H. Claudet's offer to present to the members a print from the last negative of his late father, which had fortunately escaped the fire, was a happy thought. The fact that the portrait was taken with the topaz lens in which Mr. Claudet was so especially interested gives the portrait a distinctive value, not simply as a scientific curiosity, but as a souvenir of the especial efforts of Mr. Claudet at all times in endeavouring to im prove the appliances of photography. It is just the kind of illustration of his interest in photography and of his attachment to the Photographic Society which Mr. Claudet would himself have had pleasure in seeing so distributed. The three prints promised will, we doubt not, be worth more than the year’s subscription to the Society. The proceedings at the last monthly meeting of the Society were interesting. A capital paper by Dr. Mann on the difficulties of an amateur in South Africa, a paper written in an admirable spirit, occupied the chief part of the evening. At the North, the election of officers, the reading of the annual report, and a paper on the magnesium light, by Mr. Solomon, illustrated by the production of an enlargement, occupied the evening. At the South, the “ Question Box ” was called into requisition, and an instruc tive discussion of the value of permanganate of potash for rectifying disordered baths ensued. At the Edinburgh Society, the Committee appointed to examine one of M. Adam-Salomon’s prints presented its report, which is a little puzzling. It states that the print was first sponged, which removed the whole of the retouch ing, causing the high lights and the drawing of the eyes, mouth, and shading of the face to vanish ; and that the print was then treated with turpentine, which removed the encaustic which diminished the transparency of the shadows, and showed them to be bronzed from excessive over-print- ing. The puzzle to which I just now referred arises from the fact that, as the first operation of sponging, before re moving the encaustic, washed off the retouching, it follows that the retouching was effected after the print had been treated with encaustic paste, the colour being applied upon its waxed surface, a most difficult thing to accomplish, and pre senting a rough, patchy effect when- done ; or, having been done on the unwaxed print, the coatingofwax over the retouch ing, which it required turpentine to remove, was no protection to the retouching, but permitted it to be removed by a sponge and water. This circumstance is puzzling; but, be it as it may, it is not more puzzling than that the operation should have been undertaken at all. The prints exhibited at the meeting a little more than a month ago were, according to the statements of the members, very palpably touched : this being so, it ought not to have required the destruction of a beautiful picture to ascertain a fact that was so palpable as to admit of no discussion. The experiment is clearly inconclusive as to the general character of M. Salomon’s pictures. To have given it any value, the operation should have been performed on one of the prints which did not appear to have been retouched, and if the treatment to which it was submitted demonstrated that it was really retouched, and had deceived the eye, then a general doubt as to the source of superior excellence in the whole might naturally have been entertained. All that has now been demonstrated is, that the colour upon a print, the re-
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