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
• Rechtehinweis: Public Domain Mark 1.0
• URN: urn:nbn:de:bsz:14-db-id1780948042-186800009
• PURL: http://digital.slub-dresden.de/id1780948042-18680000
• OAI: oai:de:slub-dresden:db:id-1780948042-18680000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

O. P.—With, the exception of the manual of instructions issued by Mr. Hughes, and the second part of the “ Practical Photography ” published by Messrs. Negretti and Zambra, and our own Year- Books, we know of no work containing any extended account of the various dry processes. There is no work devoted exclusively to that subject. It would not be piracy to compile such a work if care be taken that the matter is re-written, cr, when any other work is made to contribute, that due acknowledgment be made. Let us know if you contemplate such a step. W. J. A. G.— Photography in winter is always more difficult than in summer; but in clear frosty weather there is generally some good light. It is desirable to maintain a moderately warm tempera ture, both in the studio and in the dark room but it is not neces sary to keep it as high as 63°, nor would it be easy to deso. Keep it somewhere between 50° and 60°, taking care, if possible, to avoid a lower temperature than 50°. Use a 40-grain silver bath, and a tolerably strong plain iron and acetic acid developer. As a rule, avoid warming bath and developer much beyond the tempe rature of the room, and, as a rule, not at all. Use as much light as you can admit, and as large apertures in your lenses as the subject will permit, and give full exposures. White reflecting screens are often useful. Read an article in our Year-Book for 1867 on Photographing in Winter, which is full of valuable hints. The print you enclose is very good, but a little under-exposed. There is every promise of your success by that process if you persevere; but, so far as possible, use the wet process in winter. FENIAN (Belfast).—The repeated immersion of coated plates in your bath, and leaving them all night, is most probably the cause of your pinholes. The bath has become supersaturated -with iodide of silver, one of the most fertile causes of pinholes. Add to your bath an equal bulk of distilled ■water (this will precipitate a large portion of the iodide), filter, and then add crystals of nitrate of silver in proportion to the water which has been added. The markings you indicate are suggestive of a damp or dirty plate. Crape markings chiefly arise from excess of water in the collodion, which is scarcely likely to be the case with the sample you describe. It may arise from immersing the plate too soon after coating. Let it set well, and keep the plate in motion all the time immediately after immersion. 2. The maker you mention in question 2 will supply you with a good article, we believe. 3. The washing appa ratus you describe will, we doubt not, answer very well. Hypo.—As a rule, publishers prefer to buy prints rather than nega tives. We cannot tell you of any one who, as a rule, purchases negatives. Such houses as Marion and Co., or tho London Stereo scopic Company, are the best to apply to. X. Y.—The lenses you name are moderately good; certainly not equal to those of the best English makers. 2. Your question is scarcely sufficiently definite. In speaking of eight or ten feet of skylight you doubtless mean that amount in length, but you do not refer to the width, nor do you state whether there is to be any side-light, nor how much. Write again a little more explicitly, and we will give our best attention to your query. J. Turner.—See article in our last on dirty whites in developed prints. 2. Allow the prints to remain in the fixing bath about twenty minutes. It depends on the size of the print and the quantity of solution as to whether you should use it fresh for each print. It may not always be necessary to have it fresh; but with large prints it is a good precaution to use it so. We have published very full information on enlarging from time to time. If you have the volumes, look through them, and you will find information on every point connected with enlarging. Any special difficulties we shall have pleasure in advising you about; but it is difficult in this column to give general information on any topic. A. Parry.—We do not, know of anyplace where silk or linen is sold with an especial view to photography; nor do we think that any special fitness is necessary. Ordinary fine linen cambric, or muslin, and fine white silk will serve.. Perhaps some of our corre spondents who may have ■worked in this direction will state whether they have found any especial kind desirable, and where it can be procured. Collodion.—The rapid rectilinear is better for out-of-door work and general purposes than the D, tho latter better for portraiture ; but the first is the most generally useful. 2. Our personal confi dence is not shaken in England’s process, but the experience he has had shows how imperative is extreme care in manipulation. This is the case in all the dry processes to a much greater extent than in the wet. The results of the last exhibition would suggest the superiority of the gum process, and nothing, indeed, could be better in careful hands; but for general trustworthiness we still believe that the collodio-albumen is the safest. Thanks for your suggestion. We aim to consider the interests of all photographers, professional and amateur, alike; but, as a rule, all that interests professional photographers is also interesting to amateurs. There is no point and no process interesting to amateurs, that we know of, in regard to which we do not give the fullest information. H. S.—The oxyhydrogen light is more powerful than the oxycalcium light. You will find very full information on the subject in a pamphlet published by Negretti and Zambra, price one shilling. Venator.— We always recommend the wet process in preference to any dry process, where it can conveniently be used; but the gum plates yield such delicate and rapid results that in the hands of a skilled manipulator they may save much trouble in the class of work you name. 2. Clean rain water, purified by means of a little permanganate of potash, is the best substitute for distilled water. Animal charcoal is not quite admissible as a purifier, as some of tho phosphates it contains -would be dissolved by the water, and would interfere with the results. Your specimens have not reached us at the time we write. It is not necessary to use fresh water for wash ing each plate, unless a very small quantity is used. Carl Meinerth (Newburyport, U.S.)—Thanks for the specimens and your interesting letter. It is always pleasant to us to receive such long friendly and confidential letters from our readers at a distance. We shall notice the cards shortly ; they admirably illustrate the effect of printing in varied degrees of deviation from perfect contact, and so securing varied degrees of the softening effect. It is very singular how jealous photographers have ever been of any of their body attempting to secure his ideas by means of a patent, especially in cases where a special method of definitely producing something is devised, in regard to which some indefi nite ideas have been floating about. Thomas Gulliver.—Thanks. J. Martin.—Received. Wm. Blair (Perth).—Received, with many thanks. The examples of the simplified processes are very admirable. We shall have something to say upon the subject shortly. A. Brothers.—Thanks. Dr. LIESEGANG.—Received. Thanks. Dr. Jacobsen.—Received. Thanks. Wo will write shortly. J. W. Smith.—We shall have pleasure in proposing you. You will, on election and payment, bo entitled to this year’s presenta tion prints. H. Neale.—Thanks. In our next. OxONIENSIS and several Correspondents in our next. Several Articles in type are necessarily deferred for lack of space. Photographs Hiegistere. Mr. J. B. Gibson, Hexham, Photograph of Countess of Derwentwater Mr. J. Collings, Cardiff, Two Photographs of Mr. II. S. Giffard. Mr. Tollerton, Lincoln, Two Photographs of Mr. J. II. Palmer, M.P. Mr. Green, Coventry, Four Photographs of A. S. Hill, Esq., Q.C. Mr. W. Lawrence, Dublin, Five Photographs of Prince Edward of Saxe Weimar, Mr. H. J. Brooks, Abingdon, Photograph of G. Lushington, Esq. Mr. W. Hector, Crediton, Photograph of Oakmeur Valley, Devon. Mr. DONNAN, Northampton, Photograph of Mr. Ward Hunt. Mrs. II. R. Williams, Bath, Photograph of Rev. H. F. Lyte. *,* All photographs forwarded to the Publisher for registration receive attention at once; but the pressure on our space sometimes compels us to defer the acknowledgment in this column. It should be borne in mind, therefore, that non-acknowledgment at once does not necessarily imply non-receipt or non-registration. All Communications for tho Editor to be addressed to 1 5 Gough Square, Fleet Street, London, E.C.