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

656 THE PHOTOGRAPHIC NEWS. [October 9, 1885. Uo Correspondents day, October 14th, will be “Camera Stands.” On the second Wednesday in January, 1886, an exhibition of photographs by the members will be held. *,* We cannot undertake to return rejected communications. E. S. D,—1. Attach rings to the curtains, and let them ran on smooth wires. 2. A distance of 18 inches, and an area equal to one-sixth of the whole. 3. Fume it with ammonia before print ing upon it. D. E. (Glasgow.)—You cannot secure any collection as a whole by arranging with the authorities ; but there is no reason why you should not come to some understanding with individual exhibi tors. F. W. Findlon.—1. It is not necessary for a copyright photo graph to bear on its face an intimation that it is copyright; but in issuing a copyright picture, it is advisable to notify the cir cumstance that it is copyright. 2. You are at liberty to copy any non-copyright photograph, and to sell copies; but it is an unsafe thing to sell copies of any photograph unless you know it to be non-copyright, or you have the permission of the owner. Collotype.—Your question was overlooked last week. Collo types, and also reversed negatives suited for the work, are made for the trade by the Autotype Company. D. E. Goddard.—Thank you for sending it to us. You will find the required information in the “Notes.” E. T. Posse.—It has been repeatedly treated of in the News. See p. 628 of our volume for 1881. Fred. W. S. (Brixton).—Your letter has been sent on to the gentleman you name. A Subscriber.—A length of 30 feet, and a width of 9 or 10, will be ample. About one-third of the length. Artist.—1. The form can be had post free from our publishers for twopence, and the cost of registering is one-aud-sixpence. 2. Wo do not know, but would suggest that you should apply to Marion, 22, Soho Square. J. V. Drake.—Mix the colour with white of egg, apply in the usual way, and coagulate by touching the place with methylated spirit. Lex.—When the plate is well washed, immerse it in a dish con taining a few ounces of strong methylated alcohol. Rock the dish for a few minutes, so that the spirit flows over and over the film, after which pour off the spirit and renew. Finally, rinse in a similar way with sulphuric ether. It will now dry very rapidly in the air. Oxe Taken In.—It is quite clear that the lens is nothing more than a forgery, and you had batter discard it, and get something upon which you can rely. There are at the present time many spurious lenses in the second-hand market, and the maker you refer to is perhaps more honoured by imitation than anyone else. occur, Pirou, Schaeffner, Vanderborch. bronze Medals—Colons et Cie., Deroulde et Terpereau, Gallot, Craft, Lecadre, Martin, Manckenstein, Tombelle, Vandembert, Vavasseur. Asbestos Membranes for Filtering, by Breyer.—This in vention relates to the manufacture of thin layers of asbestos felt, suitable for filtering purposes. Only those asbestos fibres are suitable which, when ground, give a woolly product, and not a powdery one. After reduction to this state, by a mill or edge runner, the product is chopped so fine that the fibres do not exceed 0’2 inch in length. It is then mixed with crystalline carbonate of lime, or magnesia, the granules of which do not exceed 0'2 inch in size, and ground with water so as to effect a further reduction. The semi-fluid resulting is then treated with an acid to remove the carbonates. After washing, to remove the excess of acid, the emulsion is ready to be filtered. This is best carried on by depositing successively even layers upon a woven fabric stretched on a frame. When a felt of sufficient thickness has been obtained, the fabric to which it adheres is dried in a kiln, and the whole is then ready for use.—Journal of Chemical Industry. Activity of Antiseptics. By Ratimoff.—Seventeen antisep tics were tested on septic and putrefactive bacteria, and on microbes. Determinations were made on the quantity of each antiseptic required to kill or sterilise, and of the quantities which were insufficient to kill or sterilise. From the results of these investigations, the antiseptics are arranged in the following order of activity :—(1) Mercuric chloride, (2) silver nitrate, (3) iodine, (4) thymol, (5) copper sulphate, (6) salicylic acid, (7) zinc chloride, (8) phenol, (9) quinol, (10) kairine, (11) resorcinal, (12) chloral hydrate, (13) boric acid, (14) alcohol, (15) oil of gaul theria, (16) bitter almond oil, (17) eucalyptus oil. Paper on “Art,” by- Walter Crane.—On this day week (Friday, the 16th instant), Walter Crane will read a paper on “ Art,” before the Fabian Society. The meeting will take place at the Westminster Town Hall, and the chair will be taken at 8 p.m. A Photograph of a Curious Machine.—A Bavarian corre spondent sends us two photographs representing a tricycle or velocipede, the invention of Sylvester Krnka, the inventor of the Russian army arms. It is a most curious and wonderful con trivance, and is shown in two forms, the first a tricycle—front- steerer—the front wheel of which is double, and provided with a cog-wheel in the centre, driven by means of a chain by a pulley fixed on a platform above, and turned by the hands, the steering being done with the feet, which rest on little platforms each side the wheel. In the other pattern the machine is a five-wheeler, and takes the form of a light basket carriage, in which two children are shown seated, while the driver—a youth—sits in front to work the machine. Elaborate lamps and other parapher nalia sre shown, and our correspondent informs us that the frame is made of solid iron bars. The whole arrangement is crude, rough, and unmechanical, yet we are told that for the past year the inventor has driven his machine through the streets of Prague, and thinks no end of the invention, as, perhaps, it is only natural to suppose he should.—The Cyclist. k Giant Refractor.—Grubb, of Dublin, has just received a contract from the Admiralty to erect what will be the largest refracting telescope in the world, a 28-inch diameter instrument, for the Royal Observatory at Greenwich. Abstract of J. Chapman Jones’ Lecture at the Birkbeck Institution, October 7th.—Photography an art universally patronized, though a knowledge of its principles is generally crude, even in scientific circles. Its active agent is light, which must be under the perfect control of the operator, hence the use of dark chambers and dark rooms that admit light only when and how it is required. The light initiates a change in the sensitive surface which is perfected by chemical means ; there fore we have to study the nature of light and how to control it, as well as the chemistry of the changes it effects or makes possible. An operator who works by “ rule of thumb,’’ how ever otherwise intelligent, is a blind man, and often blindly led. The very beginner must have reliable apparatus; it requires the skill of the experienced to work under disadvantages. In this matter the novice must be content to accept the advice of others. He absolutely needs no dark room, as he can wait till evening, and use any available apartment after the simplest precautions as to drawing blinds, &c. Little dark holes in which one can neither sit, stand, turn, nor breathe, are detrimental to the photographer as well as to his work. . Photographic Club,—The subject for discussion on Wednes Uhe Ahotographit Nlews. SUBSCRIPTIONS. Including Postage to any part of the United Kingdom:-* . Yearly ... 15s. Od | Half-Yearly ... 7s. 8d. | Quarterly ... 38-- To the United States, the Continent, and the Colonies:— 3 Yearly ... 17s. 4d. | Half-Yearly ... 8s. 8d. | Quarterly ... 48• To India (Yearly) 19s. 6d. ADVERTISEMENTS IN COLUMN. Not exceeding Five Lines (36 words)... 3s. 0d. Each Additional Line 0s. 4d. Repeated insertions, and special positions or style, by conrtac • Advertisements should be forwarded (prepaid) to Piper and CARTFon 5, Castle Street, Holborn, E.C., to reach the office not later than no are Thursday. A fee of 6d. must be forwarded when the Publishen'the expected to receive and forward replies to Advertisements ; and "le name undertake the receipt of replies, they must be entrusted with tesma? nd address of advertiser, for revelation to applicants, in case the eem it necessary. Ahotographs Registered. G. Mold (Banbury)—1 Photo, each of Northern Star Express passing Ban. bury, Reindeer" Inn Yard (Banbury), Village Well (Wroxton)' 2 Photos, of Interior of St. Mary’s Church, Banbury. J. Glass (Londonderry)—2 Photos, of “Irish Athletic Team.” R. KEENE (Derby)—Photo, of Mr. J. L. Mayger. M. Boak (Gt. Driffield)—Photo, of Cow and Calf. . F. W. Broadhead (Leicester)—! Photo, each of Elizabeth Saloon an Regent’s Gallery (Belvoir Castle), ., Turner and Drinkwater (Hull)—Photo, of Lord Charles Beresfor" ’ Photo, of Lords Charles and Marcus Beresford.