The photographic news

• Bandzählung: 29.1885
• Erscheinungsdatum: 1885
• 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-id1780948042-188500006
• PURL: http://digital.slub-dresden.de/id1780948042-18850000
• OAI: oai:de:slub-dresden:db:id-1780948042-18850000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Bemerkung: Seite I-II fehlen in der Vorlage. Paginierfehler: Seite 160 als Seite 144 gezählt.
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

THE PHOTOGRAPHIC NEWS. JUNE 5, 1885.J 367 finally removing as much as possible before putting down the I prints. Mr. HENDERSOS showed some examples of gelatino-chloride I of silver printing on opal, paper, and glass (transparencies). The emulsion films, which were very vigorous, contained only 1 grains of silver to each ounce. The question, “ How to dry a bottle quickly,” was answered by several members, who advised rinsing with alcohol, followed by ether, and the air driven off or exhausted. The Chairman drew attention to an image of some printed matter which appeared upon the development of a gelatine print. This he had found to be due to light reflected from the paper padding used in the pressure frame ; he had also seen a similar result when using very thin albumenized paper, and thought many transparencies were fogged by the non-employ- ment of velvet backing. Another question was then read as follows :—“ Why is it that negatives exposed to light immediately after development take a longer time to fix? ” Some doubt was expressed whether this was really the case. Mr. W. Cobb had found it to be so ; And the Chairman remarked that some collodion emulsions exposed to light would not fix at all. Mr. A. Haddon considered those portions of a plate that were exposed to light liberated bromine, and thus tended to make the gelatine more insoluble than the other portions, and consequently less permeable to the fixing bath. A discussion then took place on Kelp, Lichens, and Gelatines, in which their respective solubility, setting, and drying proper ties were considered. Some of the preparations from sea weed, the Chairman remarked, were largely used in the manufacture of confectionery, and were worthy the notice of photographers. Agar-agar, said br.W. H. Harrison to be prepared from Ceylon moss, was stated to lose its setting properties in the presence of an acid ; \ remured a high temperature for melting, and it could only be dried y the prolonged action of dry air, after which it would not swell as gelatine does. One speaker found this substance decomposed silver-bromide without the action of light. 'The discussion then turned to the subject of concentrated versus dilute fixing baths, the latter being found more energetic than the former. 5 Mr. Haddon thought the reason why a saturated solution of hyPo acted in the manner stated was due to the affinity between the salt and the water being greater than the water for the gelatine , thus it happened that a plate might remain some time m a strong solution without swelling. and a resolution to the effect that for this year the money prizes remain unaltered, and that the Council be asked to consider the substitution of autotypes for the customary certificates, was carried. The next business was the appointment of delegates to the Committee of the Annual Associated Soiree of the Learned Societies of Liverpool, the Council being authorised to renew the annual guarantee and appoint delegates. A proposal from Mr. Beach, the President of the New York Photographic Society, with regard to the exchange of negatives for lantern transparencies, was named by the President, and it is to be brought more fully before the members later on. The PRESIDENT then called on Mr. G. E. Thompson to exhibit a collection of views taken by him during a recent trip to the Mediterranean. Mr. Thompson gave a brief account of his journey, illustrating it by two large albums filled with over two hundred views of the most artistic character. The members were greatly delighted with the number of splendid pictures, about 15 by 12, which adorned the room, and which were a source of pleasure during the whole evening. Some of them were taken under circum stances of peculiar difficulty. The Secretary then opened the question-box, and a series of questions of photographic interest were read and answered. An exchange book was brought into notice, in which members entered the details of photographic apparatus which they desired to dispose of by sale or exchange. Amongst the exhibits of the evening were some views taken at Anglesea by Mr. Lange, and in the neighbourhood of Spital, by the Secretary. A series of exquisite large transparencies for window decoration, on plates developed with soda, were shown by the Rev. H. J. Palmer. A sliding metallic tripod was ex hibited by Mr. Archer, and met with approval. Ualh in the Studio. Photographic Society of Great Britain.—The last ordin ary meeting for the present session will be held on Tuesday next, June 9th, at 8 p.m., at the Gallery, 5a, Pall Mall East, when Mr. J. R. Sawyer will re-open the discussion upon Mr. Bird’s paper, “ On the Reproduction of Pictures in the National Gallery,” and exhibit illustrations of recent discoveries in the photographic reproduction of colour ; and Mr. Leon Warnerke will read a paper “ On the New Sensitive Paper as a Substitute for Glass.” Birmingham PHOrOGRArIIC Society. A meeting of the above Society was held on May 21st, at 20, Paradise Street, W. T. Harrison, Esq., in the chair. The report of the provisional committee was read and adopted. The rules were next put forward for discussion, and were, with the exception of a few alterations, passed—That on and after July 1st next, gentlemen joining the above pay an entrance fee of 5s. Applications for membership to be sent to the Secretary, 43, Bull Street. The meeting adjourned to June 11. LIVERPOOL Amateur Photographic Association. The monthly meeting was held on the 28th May, Mr. J. H. Day in the chair. The minutes of the last meeting were read and confirmed, and Messrs. Johnson Cook, J. Macdonald Bell, and Paul Lange, elected members. The Secretary brought forward the business aiising out of the minutes of the previous meeting, the first matter being the question of following in the steps of the Oldham Association. The Secretary suggested that steps should be taken to ascertain the views of the various other photographic societies, in order that by combination the various railway companies might be approached with more effect, and ascertaining if the President and Secretary of each society would sign a petition, naming the number of members, so that the request might carry weight. This suggestion was approved. The next topic discussed was with reference to the substitution of prizes for the certificates annually issued to winners in the eleven competitions decided annually at the November meeting, Green and FUIOE’s Actinometer.—This is a small dial showing a scale of tints gradated from light to dark, and between the extremes of the scale is an opening behind which a piece of standard sensitive paper is exposed. By noting the time required to darken the paper, so as to make it correspond with any given tint, a very good notion may be formed of the exposure required. Of course, the results, in the first place, are purely relative ; but the user soon learns to judge exposures by the actinometer readings. The apparatus may also be used by the carbon printer as a guide for exposure.