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

August 21, 1885 J THE PHOTOGRAPHIC HEWS. 543 through another lens ; then the lens producing the one-inch image must be of five inches equivalent focus, and by compari son, in the same way, the equivalent focus of any other lens could be ascertained. In making these comparisons, it was important that the object which was being focussed should be a somewhat distantone—that is, should be at such a distance that anything appearing beyond the object being focussed was also practically in sharp focus with it. In confirmation of his remarks, he submitted to the meeting a number of negatives of the same object, one having been taken with a spectacle lens ; the equivalent foci which he had worked out from the sizes of the images were in some instances less, and in others more than those given by makers, and he considered the statement which one hears not seldom of a person claiming for his lens, that it will cover a larger plate than another lens of the same designa tion by the same maker, is due to its being of a longer focus than the other. The greatest discrepancy he had met with was in two ten by eight lenses of the same type by a famous maker, one being a fraction only over the equivalent focus stated in catalogue, while the other was over two inches longer in focus. At the exhibition which followed, prints were shown by Messrs. Furnival, .Tones, Jumeaux, Shaw, and Stanley. The tenth ramble of the season was to Marple on Saturday last, under the leadership of Mr. Henry Champ. Gloomy weather prevailed during the morning, and although the after noon turned out very fine and enjoyable for walking, the presence of a moderate breeze proved a drawback to successful photographic results where foliage formed an important part of the scene. The first pictures taken were views of and from Marple Bridge, after which, retracing their steps, the party made its way along the canal bank and past the celebrated locks, thirteen in number. Beaching the aqueduct, and the no less celebrated viaduct, with its thirteen arches of an uniform span of fifty feet, and a height from the river of 135 feet, views were taken from the bed of the river, with the grand two-fold row of arches peeping through the distance, forming pictures of great beauty, and endless in variety. The walk was then continued to Romiley, through Chadkirk, and on to Otterspool Bridge, views of which were taken. Then the Hall was reached, and permission was kindly given to photograph it. Birkenhead PnOTOGRAPIIIC Association. The ordinary meeting was held on the 13th instant, at the Free Public Library, Mr. J. Alexander Forrest (President) occupy ing the chair. A large number of specimens of the summer work of the members was passed round, including prints and negatives taken during the Bank Holiday excursion to Shrewsbury, Stoke- say, and Ludlow, by Messrs. Beer, Cornish, and Day. Prints and other objects of interest also were exhibited by Messrs. Atkins, Carruthers, Forrest, Jones, Whalley, and Williams, after which Mr. J. Maurice Jones read a short paper on “ One or Two Out-of-the-way Places in Wales ” (see page 638), which he illustrated with a few views of the districts described. At the conclusion of the paper, Mr. Beer remarked that, apropos of the paper which had just been read, he would heartily recommend any member who wanted to enjoy a very pleasant day in an out-of-the-way spot to visit Nant Mill, near Carnarvon, where suitable “ bits ” abounded, and where he promised those who would venture into that neighbourhood a busy time with their cameras. Mr. Forrest then read a paperette on “ Things in General ” (see page 539), which was followed by a discussion upon the subject of toning. Mr. Atkins stated that he had been given to understand that the excessive washing to which the prints were commonly sub jected was very much more injurious than was generally sup posed, and quite unnecessary ; and that the chemicals in the waler did more hann than even the small possible residue of hypo remaining after a fairly good washing. The question raised was considered rather startling, but the general feeling seemed to be that the hypo must be got rid of at all costs, and that an error in over-washing was but a choice of two evils, and rather on the right side, if any. Ualh in the Studio. PiorogRaPMIC Society of Great Britain.—The next monthly Technical Meeting of this Society will take place on Tuesday next, August 25th, at 8 p m , at 5a, Pall Mall Fast. Boom open at 7 for the perusal of journals, &c. IsocHROMIATIC Photographs, by Mr. Ives.—We have received from F. E. Ives, of Philadelphia, some remarkable specimens of isochromatic work, the most striking being copies of a chromo lithograph ; one made on an ordinary plate, and the other on an isochromatic plate. Mr. Ives writes to us thus :—“ I have im proved my process of isochromatic photography by using alcohol, which is tinted with eosine for making up the chlorophyl solu tion. It is a remarkable fact that a trace of eosine, when applied with the chlorophyl in this manner, not only produces more yellow and green sensitiveness, but at the same time increases the red sensitiveness, which is due primarily to the action of the chlorophyl. It may be doubted whether the eosine actu ally increases the sensitiveness to the- red of the spectrum ; but I have proved conclusively that it increases the sensitiveness to red pigments, which is the most important to know. I now obtain perfect photographs of the most difficult oil paintings with an exposure of less than a minute, and will send you some examples in a few days.” British Association for the Advancement of Science.— 22, Albemarle Street, London, W. The next Annual General Meeting will be held at Aberdeen, commencing on Wednesday, September 9th. President-Elect) the Bight Hon. Sir Lyon Play- fair,K.C.B.,M.P.,Ph.D.,L.L.D.,F.B.S.L.andE.,F.C.S. Authors of papers are reminded that, under an arrangement dating from 1871, the acceptance of Memoirs, and the days on which they are to be read, are now, as far as possible, determined by organ ising Committees for the several sections before the beginning of the meeting. It has therefore become necessary, in order to give an opportunity to the Committees of doing justice to the several communications, that each author should prepare an ab stract of his memoir, of a length suitable for insertion in the published Transactions of the Association, and the Council re quest that he will send it, together with the original memoir, by book-post, on or before August 12, addressed thus:—“ General Secretaries, British Association, 22, Albemarle Street, London, W. For Section ” Authors who comply with this request, and whose papers are accepted, will be furnished before the meeting with printed copies of their reports and ab stracts. If it should be inconvenient to the author that his paper should be read on any particular days, he is requested to send information thereof to the Secretaries in a separate note. Beports on the Progress of Science, and of researches entrusted to individuals or committees, must be forwarded to the Secre taries, for presentation to the Organising Committees, accom panied by a statement whether the author will be present at the annual meeting. No report, paper, or abstract can be inserted in the Report of the Association unless it is in the hands of the Secretary before the conclusion of the meeting. Winter’s Fine Art Exhibition at Derby.—An Exhibition of oil paintings, water colour drawings, and paintings on china, terra-cotta, crystoleum, wood, silvered glass, silk, tapestry, and lincrusta-walton, &c.; designs for Christmas cards, wood carv ing, fretwork, etching, &c., by professional and amateur artists, will be held at the Alexandr* Fine Art Galleries, Midland Boad, Derby, in the months of December and January next. Numerous prizes are offered, and during the last month of the Exhibition visitors will record their votes in favour of what they consider the best amateur work exhibited ; the artist will be presented with a silver badge. Sales of Competition and Exhibition— 1. The Competition and Exhibition is open to competitors from all parts, excepting in Class IV A and IVE. 2. A charge of one shilling entrance fee will be made on each article sent, and a further charge of 6d. per square foot, or fraction of a foot, for space. Screens are measured as pictures. 3. Christmas cards, sets of vases, series of tiles, and other articles constituting sets or pairs, are charged an entrance fee of Is. per set or pair, and 6d. each article for space, except when framed, then the terms are as Rule 2. The payment of entrance fees, and for space, must be sent by Postal Orders, to gether with the forms duly filled in at the time the exhibits are forwarded, thus ensuring the works being received and exhibited. 4. At the back of each frame a label must be attached, giving the name and address of the artist, stating whether professional or amateur, and the subject of the picture (original or copy), and if for sale, the price. To facilitate the hanging, this informa tion must be repeated with great distinctness and accuracy on another label, attached by a string to the top of each frame, or to the ring at the back, and made to hang over in front. The name and address of the contributor should also be given within