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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
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- Public Domain Mark 1.0
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- urn:nbn:de:bsz:14-db-id1780948042-186200003
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- http://digital.slub-dresden.de/id1780948042-18620000
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- oai:de:slub-dresden:db:id-1780948042-18620000
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- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
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- Seite 1-72 fehlen in der Vorlage. Vorlagebedingter Textverlust.
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- Wahlperiode
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- Bandzählung
- No. 204, August 1, 1862
- 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 6.1862
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- Ausgabe Ausgabe 73
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- Register Index 619
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Band
Band 6.1862
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1861 - ernatant graplis y. Tbis thexcs aannet 8 a yellow ilst the quently, irticle of y not bo y acting fuming .8 quan of coal, ure with portion, ie liquid ter, and f potash solubla rater for adding of car nitrate stallins hich art betvreen ming a yellow, t is K- bstitute f carba- mmuni- Cloth oyed as labora- test for id by a ride of hydro- potash .e preci it sepi- it pi ally de whid is ve hen th* an im is pre 1 ferro; sh, and er, and ar and s to de- left to r there . whilst of pure tageots i large parent, erature nt and ass on dantly t like- .saline n like suffers ppered August 1,1862.] THE PHOTOGRAPHIC NEWS. 863 bottle, attended with formation of ammonia. Its alcoholic solution is much more stable. Nitro-prusside of Potassium.— 1 This salt is prepared by acting upon ferro-cyanide of potassium with dilute nitric acid. The mixture first assumes a milky appearance, but after a little while the salt dissolves, forming a coffee- coloured solution, with evolution of various gases such as cyanogen, hydro-cyanic acid, &c. When the salt is completely dissolved, the solution is to be decanted into a large flask, and heated over the water bath. After a while it is removed and left to crystallize, a large quantity of nitre separates at first; the decanted liquid is neutralized with carbonate of potash, and the solution is boiled, whereupon it gradually deposits a green or brown precipitate, which must be sepa- rated by filtration. The liquid then contains nothing but titro-prusside of potassium and nitrate of potash. The latter being the least soluble crystallizes out first, and the Temaining liquid, on further evaporation, yields crystals of titro-prusside of potassium: it may be purified by recrystal- lization. The crystals form ruby-coloured prisms very solu ble in water. The great use of nitro-prusside of potassium (orof sodium) is as a test for sulphur; an addition of a soluble slphide to its solution, in even very small quantity, imme- ^ately produces a magnificent blue or purple colour, afford- ng a highly characteristic test for the least trace of a "oluble sulphide. It is of the greatest importance that many salts used by photographers should be absolutely free frm a sulphide; hence, the value of so delicate a test for this impurity will be readily appreciated. Ue Vuternational C*hibition. BRITISH PHOTOGRAPHIC DEPARTMENT. RRPRODUCTOX is not largely represented in the British Photographic Department of the Exhibition, but there are, Devertheless, some very fine examples. Amongst the most Prominent are the large copies of Raffaello’s cartoons; both Signor Caldcsi and Mr. Thurston Thompson exhibit very fne specimens of these noble reproductions. Both these Eentlemen, also, exhibit other excellent reproductions. The "gin marbles by the former—which, although not strictly ''productions, are analagous in their character and purpose— ire magnificent specimens, very valuable as works of art, and Btsessing importance in an educational point of view not ily to be overrated. Mi'. Thompson’s reproductions from mer's paintings have before been noticed in our pages ; Bregard them as decided triumphs in this line. Very few Rutings could bo found presenting greater difficulties to 4 photographer, from the prevalence of the most brilliant 6 anti-photogenic colours on the pallette of the painter ; ■ 6 few paintings that we have seen have received fuller tice from the photographer. EDollamore and Bullock have several fine reproductions, adre is one of that much-abused-by-artists, but much- ““"nired-by-the-public painting, “ The Blind Beggar,” left h SV years ago to the National Gallery by a milliner. Per- WPsfew reproductions of paintings have had a greater sale qanthis, and as photographs of the pictures in the National t lery are not permitted to be taken, it may be interesting orefer to the method by which rumour states this copy was nained, without, however, vouching for the truth of the state- enPt, We have been informed that a very skilful artist was wP oyedtomakeacopy of the painting in monochrome, from E1e i ight be produced with ease an excellent photograph, it j done, and several negatives obtained, the artist’s copy, thes.said, sold for more than it originally cost. Whether nfestory be true or not, it is well found, and the photograph Medto is an excellent copy of a very popular picture. (arv " • B. Tyne has some very fine copies of paintings and photD&S. We may call especial attention to an exquisite ‘en]pgTa i of a ^ as entitled, “ The Tomb Revisited,” " "red by Foley, the delicacy, softness, and roundness, and the low tone in keeping with the sentiment of the sub ject, are all worthy of high praise. Messrs. Cundall and Downes have also some very fine reproductions from paint ings and sculpture; a copy of a has relief in bronze, a mate rial presenting serious difficulties, is admirably executed, doing full justice to the metallic texture of surface. Speci mens are exhibited by the same firm of their fine copies of Raffaelle's drawings, executed for the late Prince Consort. Some good copies of engravings are contributed by the Amateur Photographic Association. Mr. Stephen Thomp son also sends some fine reproductions. Mr. Ramage’s reproductions of engravings, by means of photography, are as perfect as anything of the kind exhibited. Mr. Victor Prout has some very fine reproductions. Mr. Ponting has some good copies of pictures : “ Making a Hayrick,” an enlargement from a small negative of an engraving, is a very successful picture indeed. It is, we presume, a deve loped print, and the peculiar tone and extreme softness give it much the effect of a chalk drawing. The reference to development printing reminds us, that we omitted before to notice some prints by Mr. Lamb, of Aberdeen, which we had marked for mention. Some of these are developed prints, and are well worthy of the attention of visitors, as illustrating the softness, vigour, and excellence of tone which may be obtained by that method of printing. A stand of stereoscopes with M. Claudet's exquisite coloured Daguerreotypes, receives much attention. Mr. Breese’s two tables of stereoscopes with instantaneous and other - transparencies, as we have before stated, monopolize a large share of therattention and interest of visitors. Apart from the curiosity excited by the moon-light pictures, it is impossible to conceive anything more beautiful than the mass of these slides even as ordinary illustrations of photo graphy ; the rare and poetic beauty of many of the cloud and atmospheric effects and breaking water, the fine com position as pictures, the perfect instantaneity, and the wonderful rendering of difficult texture, all combine to complete the charms of these pictures. Many of them are printed from several negatives, although they present no suggestion of such a process. An effect is produced in two or three of the specimens which is very beautiful and appears very marvellous: we refer to the flood of red or golden light which streams from behind masses of cloud, irradiating the horizon and sea with the glowing hues of sunset. This effect is not produced by the hand of the painter, but is due to the skilful adaptation of photographic appliances. Wo hope at some time to have Mr. Breese’s permission to ex plain the modus operandi. We may add here, for the infor mation of various enquirers, that Mr. Breese has been induced to publish some of his slides, and is now com pleting arrangements for the purpose. Amongst other stereoscopic contributions are Negretti and Zambra’s very fine transparencies; Mr. England’s instantaneous pictures, chiefly of street scenes; Mr. Blanchard’s instantaneous marine pictures ; and a few others. Mr. Swan’s novel form of stereoscope is worthy of exami nation. The novelty consists in exhibiting a single photo graph about 12 by 10 in such a manner as to render it stereoscopic. This is effected by placing in the right posi tion a small box, containing a small photograph, forming the stereoscopic complement of the large one, and an eye piece, which shall magnify this small picture to the size of the large one: when one eye is placed to the eye-piece the large picture is opposite the other eye, and the two images combining produce a large stereoscopic picture. We may here call the attention of those interested in en larging, to one of the pictures exhibited by Mr. Swan “The First Cradle,” as from an enlarged negative by Mr. Samuel Fry, produced by the same method described recently by Mr. Vernon Heath ; some excellent specimens by the same process are also exhibited by Mr. Warner in this department. M. Joubert exhibits some fine specimens, in colours and in monochrome, of his fine photographic enamels on glass : also of his phototype printing process, both of which have
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