The photographic news

• Bandzählung: 6.1862
• Erscheinungsdatum: 1862
• 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
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• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
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[September 26,1862. THE PHOTOGRAPHIC NEWS 468 UuIk iu th Studio PHOTOGRAPHS at South Kensington.—The recently issued report on the Museum at South Kensington states, that the number of photographs issued during the year is 8884, and the amount received for them £705. Novel PHOTOGRAPHI FoRGERITS.—The novel mania for collecting rare postage stamps, and the scarcity of some of the specimens, has given rise to a novel application of photography, as a means of counterfeiting the coveted labels. Many foreign stamps, it is well known, are printed in some dark, neutral tint —brown, or black, or purple. These are easily imitated by photography, together with the cancel marks upon them, rendering detection to an untechnical eye very difficult. PHOTOGRAPHIC Sale.—We notice with regret that early in November, the whole of the photographic effects of Mr. Roger Fenton for sale, consisting of lenses, apparatus, &c., and several hundreds of published and unpublished negatives, will be offered for sale. The COLOUR of Infinite Atoms.—Any substance in infinite division must of necessity be black, from its not having breadth enough to reflect a ray of light, which requires certain definite dimensions that philosophers have measured. Metals of all colours exhibit the same phenomenon ; white silver, yellow gold and red copper may all be reduced from solutions in powder so fine that they are black. Mb. Thompson’s Changing Box.—Most of our readers will have become aware that Mr Thompson of New York, whose interesting letters on photographic matters in America appear in our pages, has a very excellent changing box for dry plates, which is the envy of many of his photographic brethren in the States. The only information that he could give on the subject was that he bought the box of an Englishman whose name he he did not remember. This box converted Mr. Coleman Sellers from wet photography to dry photography, and he immediately got a box made as nearly as possible on the same model, and has recently described it in detail. We are glad to be able to inform our American as well as our English readers that Mr. Jabez Hughes is the manufacturer of the changing box in question. We have just had a letter from Mr. Werge, who is manager of Mr. Hughes’Oxford street business, in which he says: —“ I am the veritable ‘Englishman’ who sold the camera and changing box to Mr. Thompson, who is one of the firm of Thompson Brothers, Bankers, Wall Street, New York. Mr. Hughes has one of these changing boxes in use now at Ryde, and I dare say you saw the camera and change box too when you were down there last April, if not, if you will have the kindness to call at 379 Oxford Street, I can show you one. We have made the changing box in various sizes from stereo scopic to 9x7. It is but fair to state that Mr. Rayne, one of our workmen, is the inventor of the changing box.” PHOTOGRAPIY at King’s College.—Mr. Dawson, lecturer on photography at King’s College in a recent note mentions that his classes are just about to reopen, and asks us to remind our readers of the fact. Amateurs centemplating further instruc tion will find in Mr. Dawson a first-rate photographer and able eacher. LARGE Panoramic Pictures.—Mr. Ross is progressing with the manufacture of complete sets of apparatus for large-sized panoramic pictures. We have before us a print of 1G inches by 7 inches, produced by a lens of 5 inches diameter, and 9 inches focus. The photograph is a view of a square in Bath, taken by Mr. Dawson, and, as exhibiting the capabilities of the lens, is a most satisfactory picture, although we cannot help regretting that the same amount of good photography was not expended on a more interesting and pictorial subject. We have also seen a complete set of apparatus with a lens of 6 inches diameter, and 11 inches focus, intended for pictures 18 inches long. Mr. Ross calculates that the panoramic lens, with an aperture of one-seventeenth of its focus, will cover two inches of picture for every inch of focus. This, with the last-mentioned lens, would give 22-inch pictures, but in case of the large lenses it is deemed prudent not to push them too far. For the size most commonly used, the lens of -inch focus, producing 10-inch pictures, porcelain baths of the proper curve, have now been made. South London Photographic Society.—The members of this society propose to conclude their open air season by a meeting at Dulwich, on Saturday, October 4th, where they will dine together at the “ Greyhound Inn.” Members desiring tickets, which are five shillings each, are requested to make application before October 1st, to the Secretary, Mr. Alfred Harman, 3, Albert Cottages, Hill Street, Peckham. Uo Coxxespondents, W. C.—Unless you have some skill in landscape painting do not attempt to paint skies in your negatives. The attempt is perilous, and failure is more common than success. The method adopted by Mr. Mudd is, however, the nearest approximation which maybe attempted by unpractised bauds with any chance of success. In his case, the bulk of the sky is blacked out with any opaque colour, lampblack answering very well. A few delicate, irregular streaks near the horizon, resembling stratus or cirrostratus clouds, are formed by clearing away a portion of the opaque colour, and allowing the sky, which is not too dense, to print through. In all cases the painting should be done at the back of the negative, which prevents any attempt at clouds from printing sharp or too well defined. In some cases clouds are painted on very thin, semi-transparent paper, which is placed at the back of the negative. No plan can be laid down which would be applicable to general cases ; judgment and artistic skill must always be exercised, and, in all cases, beware of attempting more than you can certainly effect well. T. P. G.—The “ Photogen ” is a patented apparatus ; but the patent refers to the manufacture of the lamp, not to the use of it. Anybody possessing one is quite at liberty to use it, provided it has been manufactured by the patentee. The cost is about £5 or £6, and probably about £1 fitting up. The material used costs a few pence for each picture. The apparatus con sists of a lamp, with flue or chimney, in which to burn a pyrotechnic pre- paration, which emits, during combustion, a very vivid, white light. The chimney is to carry off the fumes, and must be connected with the open air. The patent refers to the lamp used. We have seen very respectable photographs produced by its aid. 11. G.—With a bromo-iodized collodion a much stronger pyrogallic developer may be used than with an iodide only. But we always prefer iron and subsequent intensifying. We shall be glad to see you when you are in town. We are always at the office on Thursday afternoon. For any other time we must make a special appointment. Z. C.—India-rubber cement, made by dissolving india-rubber in chloroform or bisulphide of carbon, is the best material for joining the edges of vulca nized tubing. 2. Condy’s fluid, or a solution of an alkaline permanganate, may be used for purifying the water of which a silver bath is to be made; but should be added to a silver solution. 3. Hyposulphite of soda or sul phate of iron falling into a nitrate bath will spoil it. If only a small por tion fell in, it might be possible to remedy it, but as a general rule, it would be best to throw the whole down and make a fresh bath, as it is unwise to work with a silver bath of doubtful quality. 4. The addition of too much acetate of soda to a bath is injurious: excess of acetate of silver will, of course, be formed, and this will have many injurious effects, one of which will be that you name, a tendency to form in small crystals on the plate, and we do not know of any means of preventing it. The addition of nitric acid will decompose the acetate of silver, and leave free acetic acid in the bath. J. C. L.—We think it probable that if you add a printing-bath made with distilled water, and given to discolouration, to one made of common water which does not discolour, that bath will be likely to discolour in future, but we have never tried the experiment. R. C. H., Aurungabad.—So far as we know, both the collodions you have used for your tannin plates are simply iodized, and in our experiments a freely bromized collodion is necessary for good results by that process. So far as we understand the steps you have taken, that is the only defeat. But we cannot understand your getting a faint image without any inten sity. Try the addition of a bromide to your collodion, and development at the ordinary temperature. R. II.—We cannot state here at length the steps necessary to recover the silver from various waste solutions: instructions have often appeared in our pages. In old developing solutions it will be gradually precipitated in a metallic form, if left to stand. From fixing solutions it should be precipitated by means of liver of sulphur. Full instructions are given in No. 126 of The Photographic News, p. 60, Vol. v. 2. We know of method of removing the gloss from your background painted in oil, except giving it another coat of oil flatting. That is, paint mixed chiefly with turpentine. 3. The changing box described by Mr. Sellers, is made on the pattern of one which is made and sold at Mr. Hughes’ establishment, in Oxford-street. 4. The negative of your card picture is a little lacking in intensity. If it were a little more intense it would admit of deeper print ing and toning, and more brilliancy would be the result. With this im provement, and a little more perfect background, the picture would he good. The position of the figure is somewhat stiff. J. 1). I).—Several articles on the production of photographic transparencies have recently appeared in our pages. There is one in the number 1 August 29th, and another, by Mr. England, in the number for April 11 Instructions for painting such slides appeared in the News for April 41 We do not know of any one having second-hand slides for sale. Seventd photographic houses publish such slides. We may mention Bland a Co., Negretti and Zambra, Horne and Thornthwaite, and others. ch Varnish.—It sometimes happens that the intensity of a negative is m l reduced by varnishing, when the collodion is of a very powdery charaiet. In such a case, a coating of albumen, or gum water, while the plate -istal would prevent the varnish penetrating. The use of an amber or 1 varnish would also aid you. Several correspondents in our next. . *." Our Correspondents will aid us in our endeavours to 20 .. their difficulties if they will in all cases state details o r operations when failures occur; and when referring to Iotters articles in the News giving the exact reference. -Iy to intended for the Editor should bo addressed express him.