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The photographic news
- Bandzählung
- 7.1863
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- 1863
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 236, March 13, 1863
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Zeitschrift
The photographic news
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Band 7.1863
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- Register Index 619
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Band 7.1863
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March 13, 1863.] THE PHOTOGRAPHIC NEWS. 129 It is always recommended to filter both these developers before use. But, before we proceed to develop a picture, we must have the negative, and know all about taking it, and something of its philosophy. Instruction on these two points will form the subject of my next lesson. Uhe Jnternational Gxhibition. REPORT OF THE JURY ON PHOTOGRAPHY AND PHOTOGRAPHIC APPARATUS* France. 1458 Bertaud (Medal). 1488 DEROGY (Medal).—To both of these exhibitors in the French depart ment Medals were awarded. The first named received the award for an orthoscopic lens of very large diameter and excellent quality. The lenses of Derogy were fully tested by the Jury, and proved highly satisfactory. An ingenious arrangement for lengthening and shortening the focus of the objective by the addition of a central lens, was found to answer admirably well for the purpose to which it was intended. 1459 Bertsch, A. (Medal).—A Medal was awarded for a series of novelties in photographic apparatus. These consist of several automatic cameras with portable laboratory to facilitate the working of wet collodion out of doors without the necessity of a dark tent; also for a very excellent enlarging apparatus which he styles a « megascope heliographe, u the utility of which is illustrated by a variety of fine pictures enlarged from very small negatives. The collodion of this manufacturer is very good. 1457 DUBOSCQ, L. J. (Medal).—The apparatus for which a Medal was awarded in this instance, consisted for the appliances for using the electric light to photographic purposes, and a source of illumination for enlargement of pictures. It is stated that the specimens by Numa-Blanc (1494) and Villette (1456') were produced by means of this apparatus. 1451 Titus-Albites (II. M.).—A manipulating laboratory camera, by which all the collodion process may be worked without any dark room or tent. The principle is similar to that of the original Archer’s camera, but modified as regards the arrangements, which are very ingenious and deserving much commendation. 1476 Briois, C. A. (II. M.). 1486 Garin and Co. (II. M.). 1475 Puecii, L. (II. M.). 1493 MATIIEU-PLESSY (II. M.). Honourable mention was granted to these exhibitors for general excellence of the various photographic materials which they exhibited, consisting of apparatus, photographic papers and chemicals. In reference to the chemi cals, they deserve especial attention from the purity of the samples, as well as for the moderate price at which they are vended. 1490 HERMAGIS (H.M.) contributes a good assortment of lenses and photo graphic apparatus. His lenses have for a long time justly held a high repu tation in France. 1482 Koch (H. M.). This exhibitor is held in high estimation by his own countrymen, and the award is for general excellence of his apparatus. 1474 Marion (II. M.) contributes a variety of articles appertaining to the stationery of photography, consisting of albumenized paper, cases for preserv ing sensitive paper, albums, &c. These were all considered of great excel lence. 1489 Millet, A. (II. M.)—A variety of photographic lenses and fine pic tures obtained by their aid are considered by the Jury well worthy of attention. 1473 Rolloy (II. M.) exhibits a variety of good photographic chemicals and papers, also a varnish which, on trial, appeared to the Jury to possess many of the excellent qualities of the Sbehnee varnish. HAMBURG. 36 Kiiss, 'A. (Medal). Prussia. 1420 Busch, E. (Medal).—Both contribute lenses for photographic pur poses, which, on Arial, were found to combine many excellent qualities in an eminent degree, and some were, moreover, distinguished by great cheap ness. 1433(Medal).—The photographic, chemicals of this exhibitor are well worthy of attention ; they appear to be prepared with great care, chiefly for the supply of the retail houses. When purchased in any quan tity these productions are very cheap. 1119 Beyrich, F. (H. M.).—1427 KUNZMANN (II. M.). They exhibit many very fine samples of photographic papers, albumenized and plain. Results of a trial of several samples were very satisfactory, the proofs obtained being brilliant and perfect. Pictures. We have already seen that great strides have been made in photography in the superiority of its processes ; in the increased certainty which has been obtained by regard to the chemical condition upon which success depends ; in theimp rovementof its apparatus, and the widened scope of its appliances, aided >/• increased skill in the manipulatory details. We now proceed briefly.) refer to some of the examples of the various applications in which this progress was strikingly manifest. Portraiture, as the most universal branch of the art, claims firstattention ; and here, in pure untouched photography, requiring no aid from the pencil of the artist, the most striking advancement has been made. Pre-eminent incthis style are the vignette portraits of T. R. Williams (United Kingdom, 3182), to whom a Medal was awarded. In these, by the judicious arrange ment of light, exact chemical conditions, skilful manipulation, and artistic management, a delicacy and perfection of representation is attained which at one time would have been regarded as impossible without the after touching of the pencil. Possessing many of the same qualities, combined with a richness and depth of tone due to the mode of printing, known as the ammonionitrate process, are the portraits by T. II. Hennah (United King- aom, )• dimilar in quality and in many points of excellence, but of aigei size and bolder style, may be mentioned the portraits of M. Ken, * Continued from p. 119. (France, 1500). In all these and some others delicacy is combined with great brilliancy, and those qualities which painters obtain by elaborate finish, are here secured by skilful manipulation guided by artistic judgment Another order of excellence, in which bold artistic conception is mani fested with less attention to delicacy of manipulation, is illustrated by the productions of D. 0. Hill (United Kingdom, 3096), whose portrait groups possess great merit. The portraits of Ross and Thomson (United Kingdom, 3148) possess much of the freshness of design, and demonstrate that photographic portraiture need not be confined to the production of lifeless facial diagrams. Untouched photographic portraiture, possessing many excellent qualities, both artistic and manipulatory, is exhibited by M. Alophe (France, 1462), and by M. Nadar (France, 1498), some of whose impressions have the addi tional interest of having been printed by means of the electric light. M. Angier of Vienna (Austria, 670,) exhibited a series of very large por traits, in groups, vigorous, brilliant, and artistic ; they illustrate the fact, that the highest qualities are not incompatible with an amplitude of size not usually attempted in photographic portraiture. R. Striegler (Denmark, 133) contributes many portraits of similar excel lence to those described ; one possessing especial interest at the present moment in the eyes of the nation is a portrait of the Princess of Denmark, in which the charms of the photograph are much enhanced by the beauty, grace, and intelligence which it so faithfully depicts. (To be continued.) • Correspondence. FOREIGN SCIENCE. [Fnoar oun SPECIAL CORRESPOXDEST.] Paris, 11th March, 1863. Messieurs DavANXE and Girard have undertaken a series of researches upon the fixing of proofs by means of sulpho cyanide of ammonium, as proposed by M. Meynier. They first tried its action upon albuminate of silver, and found that it was much more energetic as a fixing agent than hyposulphite of soda. If a certain quantity of albumen be precipitated directly by nitrate of silver, and after the precipitate is washed, and treated two or three successive times by sulpho-cyanide of ammonium, the residue care fully washed, we recognise that this residue dried and be calcined leaves only very minute quantities of silver in the ashes, while, in operating in a similar manner with hypo sulphite of soda, the ashes contain, relatively, considerable quantities of silver. The sulpho-cyanide of ammonium appears, therefore, to present a real superiority over hypo sulphite of soda in respect to the absolute fixing of the whites of the proofs. Sulpho-cyanide of ammonium can be made to replace cyanide of potassium and hyposulphite of soda in all their applications. It dissolves, with the greatest facility, all the salts of silver employed in photography : chloride, bromide, iodide, &c. In the state of concentrated solution it fixes negatives very rapidly, and employed of the strength of 15 to 18 per cent, of water, it serves to fix positives. It is a substance which readily crystallizes in fine white deliquescent crystals. M. Meynier can obtain it in very considerable quantities in his manufacture of ammoniacal salts, and the recent discovery by M. Gelis allows us to assume that this salt may be manufactured at as low a price as hyposulphite of soda. It presents the advantage over the latter of being less easily decomposed, and while the slightest trace of acid puts the sulphur of the hyposulphite of soda at liberty, and compromises the proofs, there need be no such fears in employing sulpho-cyanhydrate of ammonium. It is, therefore, a substance which merits the attention of photographers; it must be carefully studied, and although the first laboratory experiments appear to have been perfectly successful, yet long and extensive practice may show some inconveniences attending its adoption, but among its known advantages we may place in the first rank that of allowing the operator to handle indifferently negatives and positives, fixing baths, &c., without incurring stains or any other risk. S. M. the Emperor has bestowed the cross of the Legion of Honour upon three photographers whose productions were most deserving attention in the late Universal Exhibi tion, viz., M. Bayard, for useful photographic inventions, M. Dubosq, for improvements in optical instruments, and on M. Poitevin, for his inventions in carbon printing and in photolithography
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