The photographic news

• Bandzählung: 7.1863
• Erscheinungsdatum: 1863
• Sprache: Englisch
• Signatur: F 135
• Vorlage: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: SLUB Dresden
• Rechtehinweis: Public Domain Mark 1.0
• URN: urn:nbn:de:bsz:14-db-id1780948042-186300004
• PURL: http://digital.slub-dresden.de/id1780948042-18630000
• OAI: oai:de:slub-dresden:db:id-1780948042-18630000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

February 27, 1863.] THE PHOTOGRAPHIC NEWS. 107 and may add our conviction, that in granting the boon, it will not bo all loss to them, as their operators will doubtless work with renewed zest and energy in consideration of such a privi lege. It would, moreover, afford to some the opportunity for occasionally trying a landscape, an opportunity for which those constantly immured in the operating room often sigh and hope at present in vain.—ED.] There are at least half-a-dozen flaws reproduced, but the above- mentioned is, we think, sufficient.” In reply to this, Mr. Bennett, the publisher of Dr. D’Orsan’s work, states that this gentleman is willing to show to any scientific gentleman, his original negatives, and the date of their reproduction, proving their priority to those of Mr. De la Rue. Ho adds, that “ to distinguish between minute flaws in the negative, and hitherto undiscovered “ flaws,” so to speak, on the furface of the moon, would require a most accurate and critical series of observations.” For the present, the matter remains there. The quarrel is a very pretty one as it stands. Since the above was in type, Mr. De la Rue has written a voluminous letter with illustrations, to the Athmaum, in which he very satisfactorily shows that Dr. D’Orsan’s published photographs are simply unauthorized copies of his own. Mr. Bennett, Dr. D’Orsan’s publisher, has also written to state, that, having applied in vain to that gentleman for dates, and a sight of his negatives, he has come to the con clusion, that it is not in Dr. D’Orsan’s power to produce evidence to overthrow the grave charges made, and that until such evidence is forthcoming, the publication of “ Our Satellite,” will be discontinued. Lectures on PIOTOGRAPIY.-We find, from a Berkshire paper, that a lecture on photography was recently delivered at the Working Men’s Institution at Newbury, by Mr. E. T. Brooks a professional photographer in that town. We think that much might be done to place correct notions of our art in the public mind, by popular lectures of this kind, and remove fallacious notions. The subject could always be made interesting. ENLARCING with a Stanhope Lens. Dear Sib,—I think your correspondent, Mr. Leary would find that in using the Stanhope lens for taking photographs of micro scopic objects, the double combination of lenses has the effect of neutralizing to a considerable extent the coloured fringe which surrounds the object when seen with the Stanhope lens only. The use of the Stanhope lens was only advocated by me as a cheap means of taking these photographs, or studying the struc ture of insects and plants. If only the latter object is desired, we have a very cheap contrivance with the Stanhope lens, costing 2s. 6d., and a long deal box, with the bottom made to slide (in the centre of which the Stanhope lens is fixed), and the top fitted with a piece of ground glass, which box any car penter would make of deal, for a trifle. I think, for enlarging from small negatives, a large double- bodied camera of deal, painted black, is certainly the cheapest, and perhaps the best apparatus for the purpose; indeed, I cannot say that I see any great improvement upon the method of en largement, which I have used for years, and a description of which will be found in the first volume of the News. I think we shall never get a really satisfactory enlargement of a por trait until we get a film on the glass that will bear magnifying to the required size without showing the structure ; all the en- larged photographs that I have seen look as if the sitter were Pitted with the small-pox, which does not improve the appear ance. I have noticed some remarks in recent numbers of the News, 011 the use of “Ammonia nitrate of silver in alcohol,” for albu- menized paper. I have found the formula, mentioned in vol. I Page 141, to answer well with some albumenized paper, but in many cases, it has dissolved the albumen ; perhaps floating for a very short time would succeed, as the solution penetrates the paper almost immediately, or using more silver, only, in that case, I think the paper must be used immediately after sensi- tizing, as even with ten grains to the ounce it soon begins to change. Believe me, my dear sir, yours very truly, Thomas Barrett. or excellent, I must demur, if we are to judge by the specimens exhibited by him at a recent meeting of the Photographic Society, and by the manner in which they were received by the members present.” Mr. Paul Pretsch next writes claiming the invention as early as 1854. There is just this distinction to be made, however, between the latter gentleman’s ingenious me thods and those before referred to :—The former refer to pro ducing from a negative an imago on paper in printing ink ; the latter to the production, by the aid of a negative, of a plate or block from which to print in the ordinary way. In fact, Mr. Pretsch incidentally indicates the difference in his communica tion : he claims, simply, reproducing photographs in printing ink ; the other claims are for producing them direct from the negative. STEREOGRAPIIS of the Moon.—A singular question as to certain photographs of the moon recently published in a work entitled “ Our Satellite,” by Dr. Le Vengeur d'Orsan, has been raised by the Athenmim, in which a possible case of disgraceful piracy is involved. The Athenaeum, in a recent number, says:—“ Looking at one of Mr. De la Rue’s photographs of the moon, we were struck with its minute resemblance to one recently published by Dr. D’Orsan—even to the appearance of a casual flaw in the glass. Whereupon we asked the question —When was Dr. D’Orsan’s negative taken? In reply we have a letter from J. B. Morgan, the Doctor’s Secretary, from which we quote this passage:—‘ Dr. D’Orsan always treated such covertly scurrilous personal attacks with dignified indifference, and would also meet those recently made with contempt, did not the interests of his publisher render the publication of an authorised contradiction of the recent mis-statements a matter of necessity.’ Unhappily, the Doctor’s Secretary forgets to answer the question put. As we are not told when Dr. D’Orsan’s negative was taken, we are unable to say which of the two lunar photographs before us was the original.” In a subsequent number, a letter from Messrs. Smith and Beck appears, in which they distinctly charge Dr. D’Orsan with piracy from a stereoscopic transparency by Mr. De la Rue, published by them. “ The proofs of this statement,” they say, “ are as follows :—Not only are the photographs exactly similar as regards both lunation and libration, but the very flaws in the collodion film of the original negative are reproduced in Dr. D’Orsan’s prints. One of the most prominent of these flaws is situated in a small plane to the N.W. of Tycho, between Orontius and Sasserides. It appears as a white speck on the collodion film of the original negative, and is reproduced as a black marking in the positive print published in the stereo scopic slide. It is reproduced again in both photographs of Dr. D’Orsan ; thus proving, not only the source from which he has obtained the photographs, but that both his published photo graphs, although professing to be taken at different lunations, are from one and the same photograph. In one of them the outlying parts around Tycho have been carefully expunged. Etliscellateons. Photographs in Printing Ink.—A correspondence has re- Cently taken place in the Times, which illustrates how amusingly uninformed even the intelligent portions of the outside world remain as to progress and capabilities of photography. First a Paragraph appeared announcing an “ Important Discovery in Photography.” This, however, merely turned out to be Mr. Rouncey's process, the alleged discovery being the production of photographs in printing ink, and was stated as follows :—“ This ink is mixed with certain chemicals, and spread completely over me paper intended to bo submitted to the action of the rays of light through a ‘ negative; ’ and the secret consists in rendering it so sensitive that an indelible photograph maybe fixed on the Paper, leaving the other portions so free as to be easily washed oft. The time required for exposure is comparatively short, and the advantage is, besides that of permanence, the fact of the subject being fixed, developed, and, as it were, completed without the various manipulations required under the old system. The superfluous ink is removed by spirits in ten minutes or a quarter of an hour, displaying a picture for delicacy of tone, beautiful gradation of light and shade, and minuteness of detail fully equal to anything heretofore obtained in photo- graphic printing.” A letter from Mr. Osborne followed, correct ing the erroneous notion that the application of printing ink Was a new discovery, and briefly detailing the history of its ap plication, first, in 185'.), by M. Asser; next by himself, and sub sequently by Col. James : all of whom not only produced photo graphs in printing ink, but also transferred them to stone for reproduction by aprinting press. He adds:—“That Mr. Pouncey may have a special method of his own I do not doubt, nor do I wish to take from him any of the merit to which he is entitled ; but to the statement that the results ho has obtained are perfect,