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The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
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- Englisch
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 1280, March 16, 1883
- Digitalisat
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Zeitschrift
The photographic news
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- Titelblatt Titelblatt I
- Register Index III
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- The photographic news
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month are —landscape, ‘ Sunshine ’; figure, 1 Always in Trouble.’ Pictures to be sent addressed to me at the Society of Arts, on or before April 5th, bearing a private mark only, accompanied by an envelope bearing a similar mark outside, and containing the name and address of the competitor. The pictures will be exhibited at the next meeting, and the members present will then decide by vote which are the successful contributions. The selected pictures of each monthly competition will be sub mitted to three artistes at the end of the year, and a special award will be made for the best picture of the year.” FLGEr of Gulls.—Mr. Henry Sampson, of Southport, sends us some striking photographs of a flight of sea-gulls, taken, he tells us, with one of Kirkby’s shutters. ACCORDING to the journal of the Russian Physico-Chemical Society, the first photographs with the electric light were made by the St. Petersburg photographer, Mr. Levitski, in the winter of 1856. If Mr. Levitski’s photographs were made no earlier than 1856 his claim to priority in this application of the electric light cannot be maintained, for the writer of this distinctly remembers seeing photographs taken by means of the electric light by the late Professor Silliman, of Yale Cottage, in the winter of 1852-3. The light was produced by the current from a galvanic battery, and the pictures were as distinct and clear as any taken by sunlight, though marred in their effect by the dense and heavy shadows.—Massachusetts Spy. Cause of the Acid Reaction Exhibited by some Kinds ox PaPER.—By Haerling. It has been stated by Feichtinger, that paper sized with resin exhibits an acid reaction, which he attributes to the presence of free sulphuric acid. According to the author, the acid reaction is not due to free acid, but to the presence of aluminium sulphate, which is used for fixing the size.—Journal of the Chemical Society. PHOTOGRAPHIC Club.—On Wednesday next, the 21st inst., the subject for discussion will be, “ On Methods of Filtering Emulsions and Coating Plates.” G0 Guxxesgunenis. *«* We cannot indertake to return rejected communications. *,* Our Publishers desire to call the notice of Advertisers to the fact that, next Friday being Good Friday, the News will be published on Thursday morning. J. L. Robin.—The best kind of arrangement is that figured on page 164 of the Year-Book. If, however, you do not wish to make it on such a large scale, fix the runners to a long, low bench or table, to the other end of which is bracketted an upright board. The complex adjustment for moving the original into any required position may well be omitted. J. H. M.—Make them of pine-wood, free from knots, and tongued or dovetailed together. When made, soak them in melted paraffin wax. R. P.—The collodion has been made with alcohol containing too much water : try another sample. If you allow a rather longer time than usual for the collodion to set, the mischief will be diminished. G. F. (Trowbridge).—1. The temperature has not any direct in fluence as regards this point. 2. There is no advantage what ever in making use of a very dilute solution; indeed, rather the reverse. 3. Either immediately, or before the lapse of much time, as any considerable heating, after the required point is reached, may do mishief. C. F. Bailey.—We have found the quantity recommended in the first and second formul far too small, and should recommend nothing weaker than the third. 2. The usual liquid ammonia. David Green.—1. It is likely to consist of a mixture of mer curous chloride (calomel), metallic silver, and a basic chloride of silver. 2. It is not to be depended upon. Purple Brown.—1. The acetate bath referred to in they ear- Book. 2. You must use more gold, and allow the film longer to set. Sensitize your own paper. 3. Galvanised iron is not so suitable, as the zinc is extremely liable to dissolve off. 4. Do not over-expose, and be especially careful not to fog the plates in the dark room. We have not tried the preparation referred to. S. Johns.—There is nothing gained by the use of such an exces sively small stop; and you will probably gain nothing by working with a smaller aperture than that of the smallest diaphragm which you refer to as belonging to the set. Western.—1. It will not oxidise if thoroughly protected from the action of the air; and the usual practice is to warm the plate, and rub it over with bee’swax. S. T. (Cambridge).—It is very unadvisable to make a dark room in such an out-of-the-way and inconvenient corner, more especially as you intend to prepare gelatino-bromide plates. Why not make a red blind for the apartment which you call your “ ordinary den ? ” Even although the window may be large, you will find it easy to arrange a light wooden frame to fit in rebates placed round the window. Two thicknesses of “ Cherry Fabric, and one of orange paper sandwiched between, will answer well in ordinary cases. When the daylight is very intense, pin up an extra thickness of the “ fabric.” Beginner.—Your acids were too weak ; hence the cotton dissolved. Unless you have been accustomed to exact chemical manipulations, you are likely to meet with numerous failures in the preparation of pyroxyline. The best directions for its manufacture are to be found in Hardwich's Photographic Chemistry. Barnes.—Nitrate of ammonia is deliquescent, and has no action on the film ; hence the reason. Certainty.—While you are a novice, you will do well to profit by the experience of others, and use one of the ordinary formulae. Thos. Ryder.—1. Gamboge is very frequently used, and answers well. Rub it on a plate with a little water. 2. Almost insoluble in alcohol, but it dissolves readily in bisulphide of carbon. 3. The ordinary solution of magenta dye, which is to be obtained for 6d. a bottle at any oil shop. B. T. C.—1. It is due to minute globules of fatty matter dis seminated through the liquid. If you agitate it with ether, the fat will be dissolved by this solvent,and the solution will rise to the top, leaving the aqueous fluid clear. 2. Be careful, as a highly danger ously explosive body may be formed unless a considerable excess is present. 3. There must be some mistake, as “ bichromate ” is undoubtedly meant. Subscriber (Warminster).—As far as we know, there are not more in this country than those you mention; but the case is very different in Germany, where a collotyper may be found in almost every large town. Johnnie.—1. The achromatic lens from the opera glass will answer very fairly well. In mounting it, take care not to pinch it hard in the cell, and turn the convex side towards the camera. Stop should be seven-eighths of an inch in front of the lens. C. C. Allford.—1. The image consists of metallic silver, and it consequently dissolves rapidly in nitric acid of moderate strength. 2. Add three or four drops of water to each ounce, try again, and repeat the dose if necessary. Too much water will cause minute reticulations all over the film. C. Black.—We believe not; it was said to be moving at the time. Robert Todd.—1. Lamp- black is almost invariably used, and you had better obtain the fine quality ordinarily known as veget able black. 2. A native oxide of iron, and its original price is a mere trifle—perhaps a shilling a ton over the expense of digging it. Otto Pfenninger.—Matt glass is bad, as it holds dirt so per sistently that it is almost impossible to clean it except by re-grinding. It would probably be worth your while to replace it by a clear glass, it being very easy to partially shade this by means of tissue paper, or a thin coating of white paint. The covering can readily be removed for winter's work, or renewed, should it become dirty. Gray.—1. You do not give us sufficient particulars; perhaps traces of hypo, have been carried into it by the fingers. There is no necessity to keep the solution in the dark. 2. No, the same quantity. 3. No. 4. About a drachm. E. P.—1. Theoretically, it should be at an infinite distance, hut one may take something like 50 yards away, as an approximation. 2. It is doubtless due to the free acid; we have met with the same kind of thing, but changed the paper. 3. We will look up what particulars we can, and post them to you. P. S. T.—Send us a print; it may perhaps be due to lime in the water. Note whether it makes any difference whether the faee is upwards or downwards. T. W. W.—The picture you allude to is by Mr. Robinson, and its title is “ A Merry Tale.” We quite agree with you. *,* We much regret that pressure on our space compels us to let Lesson V. stand over. *** Authors may have Reprints of their Articles at 3s. per page per hundred copies ; but the order must be given when the proof is returned. PHOTOGRAPHS REGISTERED. Messrs. TmPERLEY Baos. (Darwen)—Photo, of Lord Wolseley ; Photo, of Lady Wolseley. Mr. J. Lbach (olgelly)—3 Photos, of Accident on the Cambrian Railway. Mr. F. R. Ryles (Burslem)—Photo, of Mr. Rodney Smith. Mr. A. Duthie (Glasgow—Photo, of S. S. City of Home. . Messrs. APPLETON and Co. (Bradford)—3 Photos, of Oldham Street Wesleyan Chapel, Manchester. Mr. F. ARGALL (Truro)—8 Photos, of Archbishop Benson. Mr. F. DOWNER (Watford)—Photo, of Earl of Essex. Mr. James Glass (Londonderry)—Photo, of St. Columb’s Temperance Brass Band.
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