Suche löschen...
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
- Lizenz-/Rechtehinweis
- Public Domain Mark 1.0
- URN
- urn:nbn:de:bsz:14-db-id1780948042-186800009
- PURL
- http://digital.slub-dresden.de/id1780948042-18680000
- OAI-Identifier
- oai:de:slub-dresden:db:id-1780948042-18680000
- Sammlungen
- Fotografie
- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
- Strukturtyp
- Band
- Parlamentsperiode
- -
- Wahlperiode
- -
- Bandzählung
- No. 509, June 5, 1868
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
- -
- Wahlperiode
- -
-
Zeitschrift
The photographic news
-
Band
Band 12.1868
-
- Titelblatt Titelblatt I
- Kapitel Preface III
- Ausgabe Ausgabe 1
- Ausgabe Ausgabe 13
- Ausgabe Ausgabe 25
- Ausgabe Ausgabe 37
- Ausgabe Ausgabe 49
- Ausgabe Ausgabe 61
- Ausgabe Ausgabe 73
- Ausgabe Ausgabe 85
- Ausgabe Ausgabe 97
- Ausgabe Ausgabe 109
- Ausgabe Ausgabe 121
- Ausgabe Ausgabe 133
- Ausgabe Ausgabe 145
- Ausgabe Ausgabe 157
- Ausgabe Ausgabe 169
- Ausgabe Ausgabe 181
- Ausgabe Ausgabe 193
- Ausgabe Ausgabe 205
- Ausgabe Ausgabe 217
- Ausgabe Ausgabe 229
- Ausgabe Ausgabe 241
- Ausgabe Ausgabe 253
- Ausgabe Ausgabe 265
- Ausgabe Ausgabe 277
- Ausgabe Ausgabe 289
- Ausgabe Ausgabe 301
- Ausgabe Ausgabe 313
- Ausgabe Ausgabe 325
- Ausgabe Ausgabe 337
- Ausgabe Ausgabe 349
- Ausgabe Ausgabe 361
- Ausgabe Ausgabe 373
- Ausgabe Ausgabe 385
- Ausgabe Ausgabe 397
- Ausgabe Ausgabe 409
- Ausgabe Ausgabe 421
- Ausgabe Ausgabe 433
- Ausgabe Ausgabe 445
- Ausgabe Ausgabe 457
- Ausgabe Ausgabe 469
- Ausgabe Ausgabe 481
- Ausgabe Ausgabe 493
- Ausgabe Ausgabe 505
- Ausgabe Ausgabe 517
- Ausgabe Ausgabe 529
- Ausgabe Ausgabe 541
- Ausgabe Ausgabe 553
- Ausgabe Ausgabe 565
- Ausgabe Ausgabe 577
- Ausgabe Ausgabe 589
- Ausgabe Ausgabe 601
- Ausgabe Ausgabe 613
- Register The Index To Volume XII 619
-
Band
Band 12.1868
-
- Titel
- The photographic news
- Autor
- Links
- Downloads
- Einzelseite als Bild herunterladen (JPG)
-
Volltext Seite (XML)
June 5, 1868.] THE PHOTOGRAPHIC NEWS. 275 " But above all,” continued Mr. Squier, “ he wants a manua simple in language, clear in direction, brief as a primer, which shall tell him what to do, and not why anything is to be done. Many travellers have a certain knowledge of chemistry, and most a fair knowledge of things in general ; but they seldom have the time or inclination to perfect themselves in photo- graphic chemistry. They want the instruments and the mate rials, and plain instructions for their use.” Mr. Squier then proceeded to discuss the varying forms of equipment for the traveller, finally giving the preference to something of the character of a manipulating camera like that of Titus Albites, and promised, at an early date, to show one he had contrived. At the conclusion of Mr. Squier’s com munication the proceedings terminated. The Philadelphia Photogkaphic Society. The monthly meeting of the Photographic Society of Phila delphia was held Wednesday evening, May 6th, 1868, the President, Mr. FREDERIC GEAFF, in the chair. The minutes of the last meeting wore read and approved. Mr. Browne suggested that an appropriation be made from the funds of the Society, to aid the committee appointed at the National Convention of Photographers, held in New York April 7th and 8th, 1868, in their efforts to defeat the extension of the Bromide Patent. The sum of $20 was appropriated for that purpose. A paper was read, describing the work of the new Steinheil lens for landscape purposes, by Messrs. Davids and Browne, and Mr. Davids made a few remarks about the new wide- angle Dallmeyer rectilinear lens. Mr. Tilghman called the attention of the Society to a now process for intensifying negatives, advocated by Mr. G. W harton Simpson, by the use of a solution of permanganate of potash. After fixing the negative, wash and place the plate in a solution of permanganate of potash, ten grains to the ounce of water, and allow it to remain for about ten minutes. Mr. Tilghman exhibited a negative, one-half of which had been strengthened in this manner, also a print from the same. The colour of the negative which had been acted on by the potash salt was changed to a yellowish red, almoct impenetrable to actinic rays. Mr. Tilghman expressed himself as much pleased with the result, considering the idea of great value to photographers. After the exhibition of some apparatus the proceedings terminated. (orresponenre. THE ACTION OF HYPOCHLOROUS ACID IN THE NITRATE BATH. Dear Sir,—My attention has boon called to a passage in a letter from Mr. Carey Lea to a contemporary which runs as follows:— “ The suggestion made by Mr. Spiller, that the increased sensi bility may be duo to the formation of hypochlorous acid, seems to bo quite incapable of support. For, firstly, it could not even continue to be present. It is an unstable substance, and the solution, if left for several months, as expressly directed by Mr. McLachlan, would not contain an atom of it—it would all have passed into the condition of chloric acid. But even putting aside this chemical difficulty, there is the photo-chemical objection, that neither chloric nor hypo chlorous acid could aid in exalting the sensitiveness of the plates. Thus this view can neither bo sustained on chemical or photo chemical grounds." I am disposed to think that the discussion on Mr. McLachlan’s communication is now nearly over, and that photographers will scarcely need to revert to the general question ; but in the passage in question Mr Lea so strangely misapprehends tho question at issue, and so completely misrepresents what I have said, that I must ask you to insert a word or two of correction. The question of increased sensitiveness is for the first time introduced by Mr. Lea. I have never said that the presence of hypochlorous acid would induce increased sensitiveness. 1 said, on the contrary, that, being a powerful oxidizing agent, it Would, if present, prevent fog, and, as all photographers know, bodies which would operate to prevent fog would tend to check rather that increase sensitiveness. I never said that hypo chlorous acid was a stable body and would remain in tho solu tion. I suggested that in the decomposition of chloride of silver, hypochlorous acid would be generated, and that its oxidizing action would aid in removing impurities present in the nitrate, and might so effect in the end that Mr. McLachlan said was produced by the action of light on an impure sample of nitrate of silver, the description of which suggested the presence of chloride. Subsequent examination of a sample handed to me by Mr. McLachlan has confirmed my first con jecture as to the presence of a chloride.—Very truly yours, Woolwich, June 1st, 1868. John Spiller. REMOVING THE COLLODION FILM USED IN TRANSFERRING ENAMELS. Dear Sir,—In last week’s News I notice that you refer to the difficulty experienced in getting rid of the film of collodion which has been used as a support in transferring the pictures in Joubert’s and other enamel processes,'as such a film resists the action of the ordinary solvents of collodion. This difficulty, however, may bo entirely obviated by sub mitting the plate of enamel or porcelain on which the picture, embedded in the collodion film, is mounted, to a gentle heat at first, then slowly raising the temperature, and, when at the proper point, the film, it will bo observed, has been consumed. The only care necessary for the success of the operation is that the picture bo carefully mounted, with no air-bubbles under neath it, and that tho rise in tho temperature should be very gradual.—I am, dear sir, yours truly, W. T. Watson. Ualk in tbe Studio. Permanganate for Rectifying the Nitrate Bath.— The various reports which have reached us of continued ex perience with nitrate baths treated with permanganate of potash are decidedly favourable to its use, although in some cases the plates are said to bo less sensitive. Mr. Bartholomew writes:—“ I some few weeks ago made a bath with rain water treated with Condy’s fluid ; it woiked pretty well, but certainly slower than my usual ones, and on leaving a plate in all night (inadvertently) I had a fine crop of acicular crystals on it. I then made it alkaline, and sunned it for a day, and added about 5 grains chloride barium, filtered, and it works much quicker now, and perfectly free from fog, although I have put no acid in. Next bath I make with distilled water I shall try the chloride barium in place of nitric acid, after Mr. Spiller’s experiment.” Magnesia Toning Bath. -Mr. Bartholomew also says:— “ Do you hear of many that adopt the toning bath made with magnesia ? I find it far easier and more certain than any other. I dissolve the gold in aqua regia, and neutralize with common magnesia carb., and it seems always alike, and keeps well.” Stopping-out Skies, etc.—A correspondent says :—“ Some time since a gentleman advocated smoking the backs of nega tives, to obviate imperfections, &c. I find it is the easiest way of blocking-out a negative that I know of. One can follow the outline with a pointed and stiff brush to perfection.” A Bankrupt Pirate.—At the Court of Bankruptcy, before Mr. Deputy Hazlitt, William Banks Prince, a printseller, carry ing on business at 307, High Holborn, made application for release out of custody. Mr. G. Lewis, Jun., opposed on behalf of Mr. Graves, the well-known printseller and publisher in Pall Mall. He said that the debtor was convicted on the 16th of May, and sentenced to pay nineteen penalties of £5 each for infringing the copyrights of various photographs, engrav ings, and prints, the property of Mr. Graves, including the copyright of tho engraving called the "Railway Station.” In default of payment the magistrate directed the debtor to be imprisoned for tho period of fourteen days for each offence, and a warrant for his commitment was accordingly issued. Im mediately upon judgment being given in the summons in the first case the debtor executed a deed providing for payment to his creditors of 2s. in the pound by instalments. In opposi tion to the application Mr. Lewis contended that the Court ought not to interfere—certainly not until time had been given for the examination of the debtor, and the creditors said to assent to the deed, which, it was believed, had been concocted for no other purpose than to defeat Mr. Graves. His Honour held that he ought not to delay the release for an indefinite period, pending an inquiry into the deed, and he should grant the application. Mr. Lewis asked that the order might be stayed forty-eight hours, to enable him to appeal, and the Court granted the application.
- Aktuelle Seite (TXT)
- METS Datei (XML)
- IIIF Manifest (JSON)