The photographic news

• Bandzählung: 12.1868
• Erscheinungsdatum: 1868
• 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-id1780948042-186800009
• PURL: http://digital.slub-dresden.de/id1780948042-18680000
• OAI: oai:de:slub-dresden:db:id-1780948042-18680000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

March 20, 1868.] THE PHOTOGRAPHIC NEWS. 143 me on the subjects I have named, and also say what is the effect in a nitrate bath of having the impurities common in such a water as that of the New River Company ?—Very re spectfully yours, Aquarius. BLISTERS IN ALBUMINIZED PAPER. Dear Sir,—It is with much pleasure I read Mr. Bovey’s paper on the all-important subject of photographic printing, and I am glad to find that he, by the opinions he has expressed, has confirmed mine, viz., that the cause of blisteriag of albu minized prints is most reasonably accounted for by imperfect coagulation of the albumen. With thanks to Mr. Bovey and the journal in which he writes,—I am, yours &c., Vesicula. March lith, 1868. Ualk in tbe Studio, International Copyright with America.—An Inter national Copyright Bill has been laid before the American Parliament. It is to bo hoped that it will include works of fine art as well as literature, in which case the provisions of the Fine Art Copyright Act of 1868, in which photographs are protected, may probably be comprehended in the new law. The Chemical Society’s Soiree.—On Wednesday evening, 11th inst., the President and Mrs. Warren De la Rue held a reception at Willis’s Rooms, St. James’s, which, notwithstanding the unfavourable state of the weather, was attended by a numerous and distinguished assembly, both of members and visitors, including many ladies. The exhibition of objects was varied and interesting. Many gems of art were displayed, in the shape of paintings by Guido, Gainsborough, and Turner ; sculpture, Japanese porcelain, ivory carvings, and other articles of vertu. There were likewise a goodly selection of etchings by Hanhart, photographs and photo-lithographs from the Royal Arsenal at Woolwich, and others, illustrative of special novelties in the way of mechanical construction. A splendid series of new photo-enamel portraits was exhibited by M. F. Joubert. The phosphorescent figures of M. Gaiffe—the butterflies, &c., lately described in this Journal—were exhibited by Messrs. Murray and Heath, who sent, also, some exquisite examples of stereo-photography. Mr. Thomas displayed his field tent in working order, and some beautiful samples of nitrate of silver, iodide of cadmium, and other photographic chemicals. Messrs. Hopkin and Williams showed specimens of alkaloids, a large bar of metallic thallium and several of its salts, also a fino sample of hyposulphite of lime in very large and perfectly formed crystals, suggestive of the applicability of this salt to photographic use. The aniline dyes were exhibited in the form of costly masses and large crystals by Mr. W. H. Perkin and by Messrs. Nicolson and Maule. The now chloride of silver battery, invented by Messrs. De la Rue and Muller, was shown in action, and gave a brilliant electric light between carbon points separated a quarter of an inch. A variety of optical in struments were exhibited by Messrs. Horne and Thornthwaite, Murray and Heath, W. Ladd, R. and J. Beck, and J. Browning. The last-named gentleman showed, in com parison with blood, the spectrum of a newly discovered crimson colouring matter, containing copper, extracted by Mr. Church from the wing feathers of the Capo Lorey. Several largo blocks of Iceland spar, showing widely separated images by double refraction, were exhibited by Mr. Ladd ; and in a room adjoin ing were arranged a fine display of Geissler tubes, an ozone generator, and the new magneto-electric machine, deriving its power from permanent magnets bent in a circular form. Beside Sir David Brewster's old illusion of tho “cylindrical mirror,” was shown by Mr. J. Huggins, photographer, of Norwich, a new polarizing kaleidoscope, in which the ever-changing coloured figures were produced by moving plates of agate, mica, and selenite. Messrs. Beck had prepared a surprise by bringing the microscope to bear upon the frontispiece plate—a photo graph—in Mr. Barry's work on the Architecture of the Houses of Parliament, by which the initials of Mr. Pugin were clearly discernable in certain portions of the ornamental design. Quekett Soiree.—The Quekett Microscopical Club held a soiree in tho laboratory and museum of University College last Friday evening. Upwards of a thousand visitors were present, and a very magnificent collection of microscopes and various other forms of scientific apparatus was exhibited. Mr. Solomon illustrated the value of the magnesium light in illuminating enlarged images of microscopic objects. The evening was altogether a great success. Art Exhibition in Lancashire.—An intended exhibition of works of fine art, to be held at Darwen, in Lancashire, is announced to be opened in May. As photographs will form an important feature of this exhibition, those of our readers who have pictures worthy of public display will do well to con tribute to what appears likely to bo an important and interest ing local exhibition. Communications should be addressed, without delay, to W. S. Ashton, Esq., Hon. Sec., Darwen, Lancashire. The object is to provide funds for establishing an Educational Institution in Darwen. Scientific Education.—The Committee of Council of Education at South Kensington have recently passed a minuto creating scholarships for the encouragement of scientific instruction. Test for the Presence of a Free Acid. — Dissolve chloride of silver in just sufficient ammonia to make a clear solution. If a little of the test bo added to ordinary spring water, the carbonate acid present in the latter will neutralize the ammonia and precipitate the chloride. The above forms a good lecture experiment, the test being a very delicate one.— Chemical News. To Produce Etchings in Imitation of the Old Masters. —A “ Practical Man” sends the following, which has been de scribed before, but is still little known:—“ Tako a quarteror one- third glass plate, coat it with any kind of collodion, and then put it into the nitrate bath ; allow it to remain for three or four minutes, then take it out and well wash it; stand it up to dry ; when it is so—or appears to be so—give it a further dry and warm before the fire or over a spirit lamp ; then lay on the table and trace your design as you would on a copper-plate ; then work away with the etching point or needle, removing tho dry collodion dust with a duster or small bellows (no blowing with the mouth) ; when finished, print in the pressure-frame as you would a negative. For ornaments, cards, or artistic bits, good imitations of etching may bo produced at tho cost and out lay of a few ponce.” Uo Uotrespondents, Photography and Disease.—A correspondent signing " Hypo chondriac)” is disposed to have a good-natured laugh at those who attribute especially unhealthy influence to the chemicals used in photography, and seems to think that many of the symptoms described are traceable to ordinary causes. He says, speaking of his experience as an amateur:—" My symptoms were simp ly these. Once or twice in tho course of last summer, after a day’s outing with the camera, I have been visited by a most severe cold with all its attendant miseries ; at another time with a violent attack of indigestion ; and again, on one occasion, with a copious bleeding of the nose. Now I am fully persuaded that all these were but the effects of one or more of the chemicals—may be the collodion, may be the silver bath, or the hypo, which, either singly or combined, silently but surely invade the system. My matter-of-fact friends, to be sure, instead of giving me their sympathy for my martyrdom to the cause of science and art, would insist that the cold was but the consequence of my lying down on the damp grass after having worked myself up to fever heat in a broiling sun in the smallest of tents without a breath of ventila tion ; that my fit of indigestion simply arose from my having, at the end of a hard day’s work, eaten too heartily after fasting since breakfast; and that, finally, the bleeding of the nose was due to nothing but my face coming into somewhat rude contact with tho hand of a vulgar boor, whom I endeavoured to eject from my angle of view, persuasion having failed. But what can you expect from the ignorant, to whom our noble art is a dead letter ? You, Mr. Editor, I am sure, will agree with me, that we must look for the true causes elsewhere, and that we must hold tho collodion bottle responsible, until it has clearly proved its innocence, that that is the real culprit.” As wo pointed out in our comments on tho first letters which reached us on this subject, many of the symp- toms described by suffering correspondents are more legitimately attributable to inattention to ordinary hygienic laws than to the necessary influence of photography; but sufferers naturally enquire the cause of their sufferings, and nervous debility often depresses the invalid with “thick-coming fancies.” Wo prefer to point