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•EH PEOTOGR A DT[C NEWS, Vol. XXIX. No. 1406.—August 14, 1885. CONTENTS. PAGE International Inventions Exhibition 513 The Trea'ment of Double Albumenized Paper 513 The City and Guilds 514 A Visit to the Studio of a Photographic Painter 514 The Recent Convention of Phot oe raj hers at Buffalo, New York—Exhibition of Photographic Novelties 515 Artistic Feplingin Photography. By A. II. Wall 517 Meteorology for Photogjaphers. By J. Vincent Elsden, B.Sc. (Lond.j 518 Apertures for Stops for Lenses. By C. Ferris 519 Review 519 522 524 527 527 528 528 PAGE Notes 519 Patent Intelligence 521 Note on Professor Leonbard Weber’s Photometer. By Boverton Redwood, F.C.S., F.I.C 522 Photegraphy and 1 he Spectroscope. By Captain W. de W. Abney, R.E.,F.B.S The Cruise of the Ceylon, 1885. By Norman May Correspondence Pr< c< edings of Societies Talk in the Studio Answers to Correspondents INTERNATIONAL INVENTIONS EXHIBITION. I List of Awards. The following items are extracted from the general list of awards which was published on Wednesday last as a sup plement to the London Gazelle. It may be noted that the list is issued as subject to revision, but we assume that this refers rather to the wording of the clauses describing the subjects of awards, rather than the awards themselves. G, signifies gold medal; S, silver medal; and B, bronze medal. Attout—Tailfer and J. Clayton, photographic dry plates— S. J. J. Ayling, examples of photo-mechanical printing— B A. Boake anl Co., manufacture of sulphurous acid and sulphites—8. J. Cadett, instantaneous shutters for photography —S. C. G. Collins, excellence in manufacture and useful photo graphic appliances—S. A. A. Common, Celestial photographs— G. D. C. Dallas, examples of photo-mechanic d printing—S. Eastman Dry Plats and Film Co. (U.S.A.), apparatus for the pro duction of negatives in the photographic camera from continuous rolls of paper—S. E. W. Foxlee, examples of the continuating action of light in carbon printing, as discovered by Captain Abney—B. C. Hancock, examples of photo-mechanical print ing—S. George Hare, excellence in manufacture of photographic cameras—S. F. W. Hart, various photographic apparatus, inge nious and of good workmanship—S. Professor W. N. Hartley, spectrograph and spectrometer, witn photographs of the spectra of metals—S. A. L. Henderson, ceramic work—S Hopkin and Williams, fine chemicils-S. F. E. Ives (U.S.A.), im provements in the production of prepared paper and photo- typographical blocks—S. J. B. Jordan, sunshine recorder —8. Dr. Maddox, replacing collodion by gelatine in the emul sion process of photography—G. Marion and Co , photographic apparatus—S. Morgan and Kidd, argentic ge'atino-bromide pro cess for photography — B. Paget Prize Plate Company, dry plates for photography—B. Photographic Artists’ Stores, dry plates for photography—B. Photographic Society of Great Britain, historical exhibit of various processes—diplona of honour. Platinotype Company, excellence of results in photographic print ing produced by W. Willis’ invention—G. Poldireff (Russia), photography by artificial light—B. Ross and Co., progress and excellence of work in the manufacture of lenses since the early days of photography, also microscopic and other optical appa ratus—Q. W. W. Rouch ant Co., improved camera and dry P ates—S. T. Samuels, apparatus to be fitted to the photographic camera for holding and exposing dry plates—B. Sands and Hunter, Adaptation of various improvements for photographic appastus— E: B. J. Sayce, prominent share in the invention of the collodio bromide process—G. J. F. Shew and Co., various convenient con- srynnc s in connection with photographic apparatus—B. A. Piler, gelatino-chloride of silver transparencies, developed with ydroxylamine—B. Sprague and Co., photo mechanical printing .8. J. W. Swan,incandescent lamps—G. Ditto, part taken by mm in carbon printing—G. Thornthwaite, Horne, and Wood, vproved lime-light apparatus, and photographic apparatus—Is. van der Weyde, electric illumination of the sitter in photographic portraiture—B. Count Ostrorog Walery, carbon and enamel photographs—B. L. Warnerke, progress in connection with film negatives for photography’—S. Wenham Patent Gas Lamp Co., Limited, regenerative gas burner—S. W. B. “Woodbury, the part taken by him in inventions in connection with permanent photographic printing—G. THE TREATMENT OF DOUBLE ALBUMENIZED PAPER. Printing on double albumenized paper is becoming from day to d y more common with photographers. Whether or uot the very high gloss of some albumenized papers made at the present time is to be desired, is a question we can scarcely enter upon. It is certain that the painter, as a rule, prefers a dead or matt surface to a glazed one ; but there can be equally little doubt that the pictorially un educated eye rests with pleasure on a picture done on paper of high gloss, and it must be admitted that there is something to be said for the opinion which we have heard expressed: “ Better have one thing or the other, either a true matt surface, such as that of a platinum print, or a thoroughly good gloss, such as that of double albumenized paper. In fact, if you go in for what some people call • meritricious gloss,’ better have a good dose of it at once." Whatever the right or wrong of the question may be, the fact remains that ‘‘double albumenized” paper is used to a greater extent every day. and that, moreover, by improvements in the manner of manufacture, double albumenized paper is to be had to-day with a much higher surface than that of any paper which could be got a few years since. With this very high surface paper, it is cer tainly possible to get passable prints from negatives which will give nothing presentable with single albumenized paper; whilst with very dense negatives the shadow detail is better rendered. There are certain difficulties in the way of working very high surface p iper, of which we propose to say a few words. 1'he first difficulty appears the moment that the paper is floated. The edges rise from the bath much more determinedly than in the case of single albumenized paper. Indeed, if the high surface paper be very dry, it will curl up almost, into a roll, and the she-t will be spoiled by the bath liquid being carried on to the back. Vigorous breathing on the back of the paper will, as might be expected, Hatten it again after a time, but this is a troublesome operation to repeat for every sheet, especi ally as a much more prolonged breathing is necessary than for single paper. The best course to pursue is to have the paper, before it is sensitized, as damp as it can be made without danger of at all spoiling the surface. It is scarcely sufficient to hang it in a damp cellar for a few hours, unless, indeed, the cellar is almost preternaturally damp. The best method