The photographic news

• Bandzählung: 6.1862
• Erscheinungsdatum: 1862
• 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-id1780948042-186200003
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• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Bemerkung: Seite 1-72 fehlen in der Vorlage. Vorlagebedingter Textverlust.
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

[June 6,186 THE PHOTOGRAPHIC NEWS. 276 TH Salk in tbe Studio. .ascertained by experiment. Bromides generallyserve a treh go 2 they increase the sensibility, they reduce over intensity, anddey .... 1.-. nicturec h. hronetian in which +hev are requuire.ne’A Almanac. ----J --u-- " " -T wireu’v, ensure clean pictures. The proportion in which they are retrobeb.2 much upon the tendency to the opposite evils present. It is P 09 you will find from a grain to a grain and a half sufficient 10*9 pose. We prefer the collodion a few weeks iodised, and "e age " equally good at the end of two years, iodized by the formula "& 5 M. Dafft had some time ago invented a similar diaphragm for a similar purpose, which worked a little more perfectly he thought than that of M. Claudet. Various specimens of enlarging were shown by Mr. Warner and Mr. Gilling. After some further conversation, and votes of thanks to M. Claudet and others, the proceedings terminated. South London PHOTOGRAPIIIC Society.—The South London Photographic Exhibition, at the Crystal Palace, was opened to the public on Monday last. The display, both as regards numbers, quality, and arrangement, is, as wo anticipated, exceedingly good, the general effect far exceeding that at the International Exhibition. The number of frames contributed is between four and five hundred, which include excellent specimens of every process in use. We shall notice the pictures in detail in our next. New Industkies.—Mr. Hawes, in a recent lecture on the International Exhibition and the Society of Arts, makes the following remarks on photography as a “ ifew industry ” since 1851 :—“ Then, as regards new industries, or those which, from the change that has taken place in the mode of manufacture, have become almost new industries : first, we will call attention to photography, that new branch of fine art still in its infancy, but employing many thousand persons, and which is most admi rably represented by English and foreign artists. It is not for me to say which country exhibits the finest specimens. French, Austrian, and English artists have all produced pictures show ing great taste and most skilful manipulation. So great has been the progress in every branch of this art since 1851, that we may fairly expect, with the aid of chemical science, to see still greater advances in the next ten years. The apparatus and appliances exhibited for working in and out of doors are of much interest. Ono striking fact conveys a clearer view of the value of this art as an industry than any description. M. Voigtlander, a manufacturer of the most expensive lenses only, has just celebrated with his workmen the completion of his 10,000th lens; this gives some idea of the immense demand for apparatus of this character that has been created in the last few years.” The Corynramr (Works of Art) Bill.—This Bill has been submitted to a select committee of the House of Lords for revision. The Athenmum, whilst recognizing the import ance of such an Act, objects entirely to the framing of the pre sent Bill. It says —"This great principle, of the right of pro perty of an artist in his works, being admitted, it only remains to carry it out by such an equitable measure as will equally protect all parties interested under it. These parties are the artists, the purchasers of their works, either when commissioned or otherwise, and the public. Docs the Bill, as it is now framed, accomplish all these objects ? We submit that it entirely fails to do so, and that Lord Overstone is perfectly accurate in denouncing the measure as being inequitable ; as being simply an artists’ Bill for protecting their interests, and without any reference to the interests of the general purchasers of pictures, or of the public. The Lord Chancellor advocated the general principle of the measure, and carefully avoided committing himself to its details. Indeed, both he and Lord Granville, as we have shown, invited suggestions for its amendment. Now, Lord Overstone had pointed out three vital defects in the Bill. For the first time in the history of our legislation upon copy right, it proposes to give that right without limiting it to new works : secondly, it ignores the principle established by all the statutes upon copyright, that when the author of a work is employed to execute it, the copyright shall vest in the employer, and not in the author; and, thirdly, that the registration pro posed by the Bill is useless for protecting the public. It is con trary to common sense that it should do so when the contract for the preservation of the copyright may be registered at any time within twelve months after its date, and then only a short written description of the nature and subject of the work is to bo registered. How is it possible to identify any work of art by a written description ?” We c Palac tion, at Sc posed the al admit amuse the a lour i distan horn 1 Aagni lather graph the ai the ex make ful on The reproc of wha —repi ever, 1 copies hard : touche exhibi man ip softnel being attent the en dctio 'ion ft feeble, Sn ' S' Svoi t ealcul Eraph it Gui at the examy cf Chi the va Colum hut w make heat n Ineans The lions been € Alber reprod from the si subjee Dodd The • otjol All Letters, Works for Review, and other Communi, go the Editor, should be addressed to 32, PATEINOSTE* to continue blackening under the influence of light. Photos.—A piece of glass half an inch or an inch square is sufliciddg for a spectroscopic examination. 2. The cotton wool seems io cop well suited for the manufacture of pyroxyline. If your acids aretpj, weaker than the formula, you may, as you mention, increase thede P sulphuric acid ; but the difference between yours and those of the! strength appears so little that you may with propriety try themas mad equal quantities first. If the cotton dissolve in the acids, or when f, a collodion too powdery, then add more sulphuric acid next timeare notice in your copy of the Almanac whether the quantities ofacidsids, in drachms or ounces. Some copies went out with drachms of.se ve for the cotton stated should have been ounces. 3. In our praction 92 rarely used more than a grain of bromide to an ounce of collom Ig0v have generally found that proportion work well. Much depend’ 2 character of the pyroxyline and other circumstances, which, pu,k ascertained by experiment. Bromides generally serve a treble L v Ul Uorrespondents. V. B.—The addition of water to collodion has a tendency to maketz more porous, but it requires adding with care and judgment, will cause reticulation in the film. The best method of roaiji# collodion powdery for use in dry processes is to add a little D-red" soda, and shake it well up with the collodion. This will ent J the horny texture of the film. J. II. Meats.—The mottled appearance of your mounted printshento the material with which you state they are mounted. Gum,"Geod very apt to sink in through the paper, giving the dirty mottradin, which you complain. In some of them it seems to have cauSte " discolouration as well, which if it were acid, and the prin org washed, it would be very apt to do. Starch paste newly mace glue or gelatine, are best for mounting. atevb” Amateur.—Crapy diagonal lines occurring at the corner of the Pa i the collodion is poured off, arise from the plate being immenrjodiot silver bath before the film is well set. The corner where the Soharos poured off is, of course, least set of any part, and there the lines an lation occur. Aqd} A New Subscbiber.—The Latimer Clark stereoscopic camerme which you describe will be well fitted for all the purposes you Ne For copying engravings, &c., you will probably require some , lengthening the body of the camera ; that is, if you wish to coP!Az the same or nearly the same size as the originals. We shouiess recommend you to use the calotype process for anything so small w • scopic pictures. M. J., Berlin. —The letter has been forwarded. 15 A. B. C.—The print appears imperfectly fixed. Probably your hypo 1 ^ too weak, or too much used. 2. The time required for toning Wipe on the temperature and on the quality of the paper. The appeinaV the prints is the proper guide ; they should be a little blacker Uhuy are required to be in the finished print. A grain of gold is geneqg culated to tone a whole sheet of paper, but with care, and a 000 of paper, it will tone considerably more. Lens.—Entirely a fallacy to believe that in such a case " Jack is his master.” It is not the merely mechanical process of grindtye) affects the question. Do not rely upon such a fallacy at all- answer you more fully in our next than we have time to du J 2d 2. It is very difficult to eliminate acetic acid from a silver bath. % go carbonate of soda to neutralize it. acetate of silver is formed. eW of this when the bath is supersaturated place the bath in a coolPSs needle-like crystals will form, which may be filtered out. Acetatether is stated to be less soluble in a strong solution than a weak one i " by strengthening the solution you will more easily get rid of it. -si James Dale.—The sole cause of the poor brown tone of your pictuniog thinness of the negative, which manifestly does not possess any. % sufficient vigour. In order to get a rich, deep tone, no matter tint, you must have a sufficient depth of reduced silver. If yourEoe” have not enough vigour you are obliged to stop the printing b5’ depth of reduced silver is obtained, and thus you fail to get goodte.gf you tone lightly you get poor browns, if deeply you get weak, slas0 The appearance of a print from a weak negative before toning very deceiving, as its want of depth is not then very apparent cod?" Oxygen.—The method referred to is that used by the Lime Light-a It is not adapted to operations on a small scale. W. Matthews.—We had replied to your first letter privately before r your second, and answered your present queries. Ancient Photo.—The new work of M. Disderi on Photographycan 00 be obtained through any foreign bookseller in London, such 25 y) Trubner, and others. The price, if we remember rightly, in Par francs. , d J. A.—Your negatives appear to be too weak, and you do not pri i deep enough. Sec answer to James Dale. 6 C. Smartt.—A notice in our next. 2. The advantages claimed T0r) acid in the developer, are great detail, delicacy, and gradation; The formula given by Lieut.-Col. Stuart Wortley, who has produev of the finest pictures we have seen, and attributes great virtue " acid, stands thus : Water ... ... ... ... 18 ounces Sulphate of iron ... ... ...200 grains Formic acid... ... ... ... 3 drachm’ A Acetic acid ... ... ... ... 4 ,, Negatives developed with solutions containing formic acid are Sa" A