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The photographic news
- Bandzählung
- 15.1871
- Erscheinungsdatum
- 1871
- Sprache
- Englisch
- Signatur
- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- SLUB Dresden
- Lizenz-/Rechtehinweis
- Public Domain Mark 1.0
- URN
- urn:nbn:de:bsz:14-db-id1780948042-187100002
- PURL
- http://digital.slub-dresden.de/id1780948042-18710000
- OAI
- oai:de:slub-dresden:db:id-1780948042-18710000
- Sammlungen
- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
- Strukturtyp
- Band
- Parlamentsperiode
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- Wahlperiode
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- Bandzählung
- No. 652, March 3, 1871
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
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- Wahlperiode
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Zeitschrift
The photographic news
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Band
Band 15.1871
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- Titelblatt Titelblatt I
- Sonstiges Preface III
- Ausgabe Ausgabe 1
- Ausgabe Ausgabe 13
- Ausgabe Ausgabe 25
- Ausgabe Ausgabe 37
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- Ausgabe Ausgabe 385
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- Ausgabe Ausgabe 457
- Ausgabe Ausgabe 469
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- Ausgabe Ausgabe 553
- Ausgabe Ausgabe 565
- Ausgabe Ausgabe 577
- Ausgabe Ausgabe 589
- Ausgabe Ausgabe 601
- Ausgabe Ausgabe 613
- Register Index 619
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Band
Band 15.1871
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- Titel
- The photographic news
- Autor
- Links
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Volltext Seite (XML)
Novelties in PORTEAITURE.—Our correspondent, Mr. Jef- fryes, to whose scroll portraits, which he has styled “ Effecto- graphs,” we called attention, mentions some other novel effects which find favour with customers. In one, the portrait bust, from life, is printed upon a pedestal produced by masking, giving the effect of sculptured bust. In another, the picture is surrounded by a rustic frame-work, also produced by mask ing and a little aid from the pencil. Mr. Jeffryes is trying to produce masks in which the necessary lines or shading will print through, so as to render the pencil unnecessary ; and he thinks he will succeed. MICROSCOPIC Photography fob Pigeon Post.—A Paris correspondent of the Daily Telegraph says:—“I was much inter ested yesterday in an explanation of the pigeon system kindly given to me at the Central Telegraph Office. The microscopic telegrams sent from Tours were at first printed on thin paper by the ordinary system of photographic reduction ; but the paper was too heavy—a pigeon could carry only five of the little sheets, though they measure no more than three inches long and two inches broad. To get over this difficulty the despatches were photographed on pieces of collodion of the same size as the paper, each little bit containing thirty columns, and averaging 20,000 words—that is to say, about the contents of thirteen leaded columns of a London newspaper. From four teen to eighteen of these tiny leaves were put into a quill and tied to a pigeon’s tail, several copies of the same leaves being sent by different pigeons, so as to diminish the risk of loss. When the bird reached Paris the quill was immediately for warded to the telegraph station, were the leaves were read through a microscope to a clerk, who wrote out the despatches for each person. But this was a terribly slow process : it per mitted the employment of only one reader and only one writer, which was insufficient for copying some 30,000 telegrams of ten words each. So, after a few days, the leaves were successively placed in a large microscope, to which electric light was adap ted ; and the magnified image of each leaf was projected on a white board, from which it was copied by as many clerks, taking a column each, as could manage to get sight of it from the writing table. This, however, was still too slow, and the final improvement was invented. Instead of throwing the image on the white board, it was photographed straight off upon a large sheet of collodion ; direct positive proofs being obtained, without any intervention of a negative, by the substi tution of black for white, and vice versa. The collodion sheets where cut up, and the pieces were distributed to a hundred clerks; so that all the cargo of a pigeon was copied and sent ont in a single day. The explanation which I received was accompanied by a practical illustration of the working of the process ; and when I left I was presented, to my very great satis faction, with an original pigeon despatch of the 11th of Novem ber. I shall carefully preserve that strange little memorial of the siege,” The Action of Light on Sulphub.—Yellow phosphorus is changed into red phosphorus by the action of light. The observations of Lallemand, communicated to the Paris Academy, show that light affects sulphur in a similiar manner. His report to the Academy is as follows:—“When a concentrated solution of sulphur in sulphate of carbon is exposed to the con centrated light of a lens, yellow sulphur will be thrown down in a few seconds, the liquid becomes turbid, and small particles of sul phur will collect on the bottom, which are distinguished from the original sulphur by no longer being soluble in sulphate of car bon. Light which has passed through a solution containing sulphur shows remarkable changes in the spectroscope. All the Says between G and H and the extreme violet spectrum have disappeared completely’.—Miitheilungen. Selling Indecent Photographs.—On Thursday week Police-constable Murgatroyd caught John West, a man minus • hand, selling an indecent photograph to a young man in Bridge Street, Bradford. He took West into custody, and in ms possession was found a number of other photogiaphs of a most Qbjectionable character, prisoner apparently doing a trade in Wese vile productions. A “ gallanty show,” belonging to " est, had been left at the Midland railway station, and on a revolving apparatus inside the box were coloured photographs, equally disgusting as those found on his person. West was bought up at the Borough court on Friday, and was sent to Prison for one month. vPHOTOGRAPHING UNTRIED PRISONERS.—At the recent -Cdlesex Sessions a special report was presented from the Visiting Justices of the House of Detention as to the taking of photographic likenesses of prisoners for the information of the police. It was merely a reiteration of the objections they had expressed on the last county day as to taking the likenesses of persons waiting their trial, who were, until convicted, supposed to be innocent of the charges preferred against them. They had fully re-considered the subject since the last county day, and, having examined it in all its bearings, on constitutional grounds they saw no reason to depart from the opinion they had expressed in their former report. Mr. Sharpe moved the adoption of the report, and said there was nothing in the Act of Parliament to authorize the magistrates of this country to compel unconvicted persons to have their likenesses taken. After some discussion the report was received and adopted. UD Corresponents. ADVICE to Correspondents.—We are at all times glad to advise our readers on any subject connected with the art upon which information can be given in this column; but to enable us to do so with efficiency, and without unnecessary waste of.time and space, it is desirable that a few conditions should be observed by correspondents. All questions should be stated clearly, and written legibly on sheets of note paper, small scraps of paper and sheets of foolscap being equally unsuitable and inconvenient. Where several ques tions are asked, they should be kept distinct and numbered. Where processes and formula; have been stated in our pages, it is better for correspondents to refer thereto than to request us to do so, as we cannot, with fairness, occupy space by repeating formula; which have once appeared, merely to save a little trouble to individuals. Correspondents should use distinctive names or initials : such signatures as “ A Sub scriber,” “An Amateur,” and others of a general character being often adopted by a few correspondents in the same week leads to confusion. J. MALEB.—The legality of copying a photograph entirely depends upon the circumstances. If the proper steps, in accordance with the statute, have been taken for securing the copyright in the photograph, it is illegal to copy it, and you would be liable to the penalties for making a copy. There is no method of ascertaining whether the photograph be copyright or not without examining the Registry at Stationers’ Hall, and ascertaining that all condi tions have been complied with. The absence of any intimation on the photograph of its copyright character is no guide for your action, so that you are in danger in copying any photograph un less you have definite knowledge that it is not copyright. 2. The material used for making the bellows of cameras is leather lined with black calico or black linen. We believe that the leather is that generally known as skiver, which is a split sheepskin. You can probably obtain a bellows-body of the material to make one of some of the camera-makers whose advertisements you will find in our pages. 3. The copying-camera to which you refer was de scribed by the maker ; we cannot give you any fuller details. Trebla.—You will be able to obtain of a photographic dealer, or of a dealer in chemical apparatus, vessels made of porcelain ex pressly for boiling solutions, and so annealed as to stand fire. With care, also, you may safely boil a bath in a Florence flask. Ordinary glazed saucepans are not necessarily suitable; the glaze may be of various substances ; but it would be difficult for you to ascertain what yours is, or what contamination the silver bath may have received. 2. We cannot, therefore, tell you what the remedy may be. The small, needle-like crystals are most sug gestive of iodide of silver, which it is quite possible you may not have eliminated. 3. Acetic acid should not be added to the bath. Some operators use it, but its use generally involves many troubles, and the instability of the bath. 4. When acetic acid has once been added to a nitrate bath it is almost impossible to eliminate it. If you neutralize it with an alkali—say carbonate of soda—acetate of soda is formed, but this is quickly decomposed, acetate of silver being formed. This tends to give density, but it often causes in sensitiveness and an unstable condition in the bath. o. There are various modes of making the paper keep well for a few days after sensitizing. The addition of a little sugar to th e bath aids in this. Washing the free nitrate off aids materially. If you only wish the paper to keep a day or two, dry rapidly after sensitizing, and Keep the paper dry and protected from the atmosphere, either by rolling up tightly and enclosing in a tin case, or placing under a weight. Arthur T. Cooper.—The article to which you refer was con densed from the Photographic News, p. 28, Vol. XIII, January 15, 1869.
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