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
• PURL: http://digital.slub-dresden.de/id1780948042-18620000
• OAI: oai:de:slub-dresden:db:id-1780948042-18620000
• 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

Scott, B.E., who has charge of this branch of the work, and to Corporal Rider, R.E., who is employed on it, we are chiefly indebted for this success. In giving these quotations, I merely wish to show my claim to a rather large share of the invention, or application, of the process.—I am, sir, yours obediently, Arch. J. Rider. P.S. I enclose a specimen of half-tone, which I have done on paper prepared with bichromate of potash and gelatine, and used on the same day of preparation. I may add, it is from stone, and is untouched. ["There is unquestionable lithographic half-tone in the speci men forwarded, although not so much as in that we received from Col. James. We shall be glad to see and hear more on the subject.—Ed.] Action or Light on Walnut Juice. Dear Sib,—I see in your number of the 81st ultimo, a letter from “ J. H. W. ” herbalist, of Canterbury, claiming the discovery of the extract of walnut green shell having the same properties as nitrate of silver. Having written to you of my discovery of the same two years ago, and which you then noticed in the News “ To Corres pondents,” may I beg of your insertion of this letter, claiming priority of discovery, I would further add that, after exposure to light, if the resulting picture be placed to soak for a few minutes in liq. am. fort, and aqua, in the proportion of 2 drams to 20 ounces, no further treatment will be necessary to ensure fixation. (Colour, rich brown.) The same properties belong to the juice of the elm, oak, sycamore, lettuce, and others, giving in each case, a different shade of colour. Albumenized paper must on no account be used, as the stringent properties of the walnut and other juices completely dissolve the albumen.—I am, dear sir, yours truly, W. H. Warner, Photographer, Ross. P. S.—If the juice direct from the walnut tree be taken, v colour similar to raw sienna is the result. Mi in tbe Studio. Instantaneous Tannin Plates.—We have received from Mr. Hurst, of Mirfield, prints from some instantaneous negatives taken on tannin plates on the third of November. One consists of a sea view with portions of a partially submerged wreck, the other a coast view with moving figures. It would be too much to say that there was no trace of under-exposure, but it is very slight indeed. An instantaneous view, and one exposed for a minute and a quarter by another process are nearly alike in photographic qualities. Mr. Hurst wishes to verify his experiments before publishing the details. When he is perfectly satisfied, our readers are promised further information. Varnish.—A correspondent says :—“ Many of your readers seem to lack a good varnish for negatives. I think they will be satisfied if they try Ponting’s Bristol varnish. I always use it and never find it stick in the sun.” Erratum.—Messrs Helsby and Co., of Liverpool, inform us that the card portraits from their establishment, which we recently noticed, as produced by Ross’s ordinary 5X4 portrait lens, were not so produced, but with Ross’s card lens No. 3. Photographic Contributions to the Lancashire Fund. — Lieut. Col. Stuart Wortley has addressed the following letter to the Lord Mayor. We shall be glad to see others follow his noble example.—" My Lord Mayor,—The Council of the Photo graphic Society, whose annual Exhibition of Photographs will open early in January, have allotted me space for a frame of pictures therein. They have kindly consented to allow me to place spare copies of these pictures on sale in their rooms, the produce of which sale I purpose devoting to the relief of the Lancashire operatives. As money is most urgently required at this time, I enclose herewith £25, feeling no doubt that pictures to this amount, at least will be sold, and hoping even to send you a further sum before the close of the Photographic Exhibition. I have published my intention of thus disposing of my pictures, in the hope that other of my brother amateurs may be induced to make some like arrangement for the benefit of our suffering fellow-countrymen.—I have the honour to be, My Lord Mayor, your obedient servant, Henry Stuart Wortley, Lieut. Colonel. Ul Ooxrespondents. Notice.—The Publisher will be happy to exchange, or pay full price, for the following numbers of the Photographic News —6, 9, 41, 53, 66, 70, 75, 76, 79, 80, 81, 101, 102, 169, 198, 202, 203, 214. *,* We have to claim the indulgence of many of our advertising friends this week, whose announcements are omitted for want of space. Viator.—If you wish your backgrounds to roll without cracking, you had better paint them in oil colours, using turpentine chiefly as a vehicle, so that the colour may dry flat. Distemper or soap flatting may be used with advantage by one accustomed to the work of scene painting; but unless you are familiar with the work, oil colour will answer your purpose best, as it does not dry quickly, and allows you to correct the drawing readily, if necessary. 2. A variety of methods have been recommended, and used with more or less of success for keeping the plate moist a few hours, such as nitrate of magnesia, honey or molasses, water and acetic acid, glyce rine, &c. A very excellent preparation for the purpose is a mixture of honey and albumen. If card portraits are carefully rolled after colouring, a smooth surface is obtained ; or the use of Clausel's encaustic paste will answer the same purpose. A. B. C.—In copying, it will, of course, be necessary to have a camera which extends sufficiently to allow you to obtain an image of the desired size ; but this will not affect the question of lighting. The best mode of lighting depends much upon the nature of the subject to be copied, and whether it has a polished surface or not. Many photographers prefer to copy in the open air, where the light falls on the picture to be copied from all quarters. If you copy in a room, let the light fall on the surface to be copied at right angles. If the subject have a polished or varnished surface, take care that nothing be in the way to cause reflections. Take care that the camera and picture to be copied are quite parallel. Cover up the front of your camera with black velvet, with a hole for the lens, otherwise the brass mounting of the lens, &cwill be reflected. Use your judgment and try a few positions, and you will doubtless succeed. 2. The amount of silver in the clippings of fixed prints is so infinitesimally small, that it would not pay for the trouble of recovery. IT. Rae.—The brass bindings for corners, focussing screw, and bellows bodies of cameras, are all made by different persons, who manufacture for camera makers. It is possible that one of the latter might be willing to supply you with them ; but we cannot tell. We cannot tell you the price, but the screw is a very expensive article. We have heard about fifteen.shillings mentioned as the price for a screw of a 10 x 8 camera. Socius.—The process by which Dr. Hill Norris’s extra sensitive dry plates are prepared is not published. Our pages have contained descriptions of several rapid dry processes, but entire certainty in their use has not been obtained. 2. We have not experimented largely in the restoration of faded prints : but we have not much faith in any of the processes which have been proposed. 3. We have not tried the keeping of dry plates pre pared with sugar, but it is probable that if any trace of free nitrate be left they will not keep long, as sugar has a reducing tendency. If they have been perfectly washed, we see no reason why they should not keep. J. Paul.—The solution of iodine we recommended as a preventative to the formation of a red deposit on the shadows during intensifying, should be applied to the plate after washing away the iron developing solution, and washed off before applying the intensifying solution of pyro and silver. R. H.—We have not purchased Stockholm pitch, but should presume that it would be kept in large towns at oil shops, or perhaps at tool shops. Perhaps our correspondent, Mr. Nicholls, will state. W. IT. II.—The largest of the two lenses is infinitely best for the work, and should be chosen by those who can afford it, and have length of room sufi cicnt to use it. Almost all the first rate artists whom we know use the larger one. 2. To keep up the ammonia nitrate bath keep adding from from time to time more strong solution, made as at first. It may be ren dered colourless with kaolin. W. M.—The maker you mark as No. 2 is first rate. Write to him, and he will tell you which is best suited to your room. F. M. Y.—It is by no means .uncommon, in working in the field, to develop with iron only, and defer intensifying or fixing until evening, at home. Some prefer to cover the plate with glycerine to preserve its moisture ; others allow the plate to dry. In the latter case it is desirable to fix before intensifying, as, if the plate have been exposed to light before intensifying, whilst it still contains iodide of silver, it is apt to fog. By fixing and in tensifying at home, the amount of water required is reduced to a minimum. A bath with water would be sufficient, leaving one plate in until an other was ready. A bath holding a quart might wash a dozen or two stereo plates. We should not recommend delaying for more than a day or two, unless the plates were very perfectly washed. 2. You may add from half a grain to a grain of bromide of ammonium to Ponting’s iodized collodion with advantage for many purposes. JUSTITIA.—The best kind of negative for enlargement is one which is very full of detail and modelling, very sharp, very free from defects, and not very intense. The transparent positive should be very thoroughly exposed, and full of detail, and not very dense. It is in the kind of positive that mistakes are generally made. It should be more fully exposed, and much more full of detail than would be deemed sufficient to produce a good transparent positive for ordinary purposes. Both the original negative and the transparency should be very free from fog or abnormal reduction ; with a few brilliant points quite transparent, but not more than points. The faults you describe are those which are most common in enlarged nega tives, and which maybe avoided, we think, by carefully foliowingout these hints. Mr. Warner and Mr. Heath each use Dallmeyer's triple lens for enlarging. We believe it is the best lens for the purpose. FRANCAIS.— There is not, we believe, a law of copyright which protects photo graphers in France, but the attention of the French Government has been directed to the subject. If such a law existed it would probably apply in this country, as the recent Photographic Copyright Act includes the pro visions of the International Copyright Act. As the matter stands, French photographs have no protection, we believe, in this country. II. C. 8. G.—The card enclosed has many excellent qualities. If,the bacK7 ground were little less heavy, the picture would be very good. The nega tive would have borne the least trifle more exposure. Several correspondents in our next.