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The photographic news
- Bandzählung
- 6.1862
- Erscheinungsdatum
- 1862
- Sprache
- Englisch
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- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
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- http://digital.slub-dresden.de/id1780948042-18620000
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- Bandzählung
- No. 197, June 13, 1862
- Digitalisat
- SLUB Dresden
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Zeitschrift
The photographic news
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Band 6.1862
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- Register Index 619
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Band
Band 6.1862
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286 THE PHOTOGRAPHIC NEWS. [.Tune 13,1862. I particular importance have been developed in connection with the art, no particular novelty in process or apparatus has been introduced to notice ; but in every department, artistic, chemical, and optical, very rapid strides have been made in the direction of pictorial truth and beauty. Every paper read at our own meetings, and nearly every paper read before kindred associations have had their bearing more or less direct on the perfection of photographs as pictures, and in the Photographic Journals the principles of art in their applications to landscape and figure compositions have received regular and continued attention. We think this is an advancement in the right direction. The claims of photography as a fine art have been put prominently forward since our last annual meeting, and no little controversy has arisen in all quarters from the fact of the Commissioners for the International Exhibition having classified photography under the term “ mechanical.” The Central Society took an active part in opposing such an arrangement, and called upon all societies devoted to the art to join them in protesting against its injustice. In reply to a circular letter from Dr. Diamond, the South London Society, while thanking and applauding the Council of the Central Society for the energy and character of its proceedings, and fully approving the object thereof, ex pressed a hope that it (the Central Society) would not take such steps as might tend to exclude British photography from competing upon equal terms with its foreign brethren and rivals. The controversy between the Commissioners and the Council of the Central Society which commenced in the May previous having terminated very unsatisfactorily in August last, and all appearances seeming to argue the entire neglect of the interests of photography, so far as regarded its connection with this country and the Great Exhibition, the South London Society took action in the matter, and memorialized Her Majesty’s Commissioners, urging the im portance of making arrangements which might induce photographers to co-operate in the production of such a result as should best serve the art, and do most honour to the country. Steps similar to those proposed in the memo rial were taken by the Commissioners, and shortly after, their secretary, Mr. Sandford, politely acknowledged its receipt. Much dissatisfaction lias been pretty generally and pretty justly expressed with the position assigned to British photo- graphy in the International Exhibition. The art has been located in the smaller portion of a comparatively small apartment, situated in the most remote part of the building, and approached by a most uninviting entrance, with scarcely notice to indicate where it may possibly lead to, the said entrance appearing more like the opening to a ventilating shaft than anything of greater consequence. Despite the insult to which photographers generally have been subjected in the catalogue classification, however, photography is to the full as attractive as any other portion of the great show, and will undoubtedly carry off high honours, of which the share of this country will be by no means insignificant; for, contrary to public expectation, British photography ranks proudly with the best of its foreign companions. The out door meetings, which were so pleasantly taken advantage of during our past recesses, will be resumed during the present, only instead of meeting once a month, it is pro posed that we meet once a week; and, to avoid some of the chances which led to no little apprehension and disappoint ment last year, the dates and places of meeting, with the hour at which we shall assemble, will be announced before the close of this evening’s proceedings. The presentation print selected for the past year, in pur suance of the plan adopted by the first managing Com mittee, of selecting from the works of some eminent photo grapher a specimen illustrative of a distinct phase of the art in connection with some one distinctive process, was selected from the works of Mr. H. P. Robinson, of Leamington, being a landscape by the wet process. ,180 * From Jiuiit/.hreif's Journal. Correspondente. FOREIGN SCIENCE. [FROM OUR SPECIAL CORRESPONDENT.] Paris, ^th FUSED NITRATE OF SILVER. BY PROFESSOR E. EMERSON*. “Commercial crystallized nitrate of silver is frequently co#' I taminated with traces of an impurity, which is probably! I duced by organic matter falling into the nitric acid employ 1 ’ I in dissolving the silver. Repeated recrystallization is requind I to remove this substance. If allowed to remain, it injurestI sensitiveness of the film to obscure radiations, makes t I negative weak and metallic, reverses the action of the h# I and produces either foggings or markings of various kindl the result of irregular reduction of silver.”—Hardwidl. I I can furnish an illustration of the truth of the abo" I passage by detailing the experience of a young friendd I mine, who is deeply interested in amateur photography-1 His silver bath was carefully made with pure rain watf I and crystallized nitrate of silver, iodized in the IStt I manner, and was used at first at a temperature of 502 Ea I The collodion was a sample giving intense results in"! I own practice; but in my friend’s hands the result, inett?I case, was very weak and metallic. The following chM?" I were then made, in a course of careful experiments exte ing through three weeks :— 1. The acidity of the bath was varied. 2. The strength of the developing solution was modifed I 3. The amount of acetic acid in the developer was van" I 4. The sample of sulphate of iron was changed. , I 5. Alcohol and ether were gradually added to the silver By' I 6. The bath was exposed to the sunlight for a day,attd I being made neutral. I The result in each of the foregoing cases was feeble negatin® I 7. The temperature was now raised to 60° Fah. 8. The bath was boiled down, and carefully dilutedag I with pure pump water, and slightly acidified ; but with 11 I change for the better. X 9. The developer was again varied in several ways. • I improvement. « I 10. Care was now taken to see that the bath was ft • I iodized. ,aeI 11. The temperature was raised to 70° Fah. for all " solutions. 12. The bath was again exposed to the sunlight for ad I Until finally, every condition had been repeatedly chang, except that of the nitrate of silver, and the uniform re I were great slowness, and a weak and metallic image, vl 13. The nitrate of silver was now carefully fused, andaV bath again made with pure pump water. The immedI and permanent results were rapidity and intensity with I same samples of collodion. M. Becquerel, in presenting to the Academie d^s Seicl I treatise on photolithography, and on printing photogtSa I positives in carbon, and other indelible coloured Pog I stated, that he had no hesitation in affirming that the" I cess of carbon printing, to which the French PhotogvP d Society lately awarded the prize offered by the dr Luynes, is the greatest progress realized in photog™ since its discovery by Daguerre. . na]d I Dr. Ozanam asserts that carbonic acid gas, when in a I is a most efficacious anesthesiac agent, entirely frensbr I danger. Ether and chloroform are unquestionably Ad I siac agents, of great energy and value, but they often ped' death, even under circumstances where no reason to ed V fatal issue existed; it is therefore greatly' to be destpef substitute for it a succedaneum of equal efficacy, inoffensive. This succedaneum, Dr. Ozanam think® p” carbonic acid. Forty experiments made upon ' • I
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