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The photographic news
- Bandzählung
- 24.1880
- Erscheinungsdatum
- 1880
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- Englisch
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- F 135
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 1149, September 10, 1880
- Digitalisat
- SLUB Dresden
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- Ausgabe
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Zeitschrift
The photographic news
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Band
Band 24.1880
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- Register Index 631
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Band
Band 24.1880
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444 THE PHOTOGRAPHIC NEWS. [September 10, 1880. ©0 Gorxesgondents. . JL . IV X • • -mw---me J ’ 7 • • •V F J •T NEWS containing all the information that has been published: It is very strange you should have had no reply from the All Communications cinnecled with Advertisements and Business to be addressed to Messrs. Piper and Carter, "Photographic News" Office, 5, Castle Street, Nolborn, E.C. Advertisers are request’d to make all Cheques payable to Messrs. Piper and Carter, andcrossed “ Union Bank, Photographic News Account.” W. Smoker.—Thank you for note. Jabez Hughes’ Principles and Practice of Photography is a clear little book, advertised in our columns; Abney’s Handbook, and Heighway's, both of which may be had of our Publishers, are also to be recoin- mended. Our forthcoming Year-Book will give you the latest improvements, but you will gather them also from the N EWS. Both the lenses you mention are good. J. T. Simons.—There can be little doubt the lithograph you send is a colourable imitation of your portrait; at the same time, the lithograph is of such an imperfect character, that it cannot com pete with the sale of your picture ; and we doubt whether any judge would, under the circumstances, grant an injunction. Even if he would, the expense would be too great to warrant you in taking proceedings. It is certainly very vexatious, but people really desirous of purchasing the portrait would not hesitate between the photograph and the lithograph. H. AV. A.—You will find in the Post Office Directory a dozen firms from which sheet gelatine may be purchased, if you look under the “ Trades ” section ; if you want but a few sheets only, any photographic dealer could get them for you. A five per cent, bichromate bath will answer the purpose. Osnaburgh.—Castor oil is added to the collodion. J. T.—Five shillings, we believe, for amateurs ; but write your self to the Company. M. Morgan.—The firm is not now in existence. Mike. —Liver of sulphur is best; not chloride, but sulphide. ENQUIRER.—The name occurs in Fabre’s aide memoire, as onoof the principal photographers in Algiers. W. W.—1. We do not believe much in the addition of one or the other, but of the two we should prefer the liquid; a few drops to the pint. 2. For preserving purposes, any strength of bicarbonate will do; say, make a saturated solution and dilute with an equal n the Bulletin, with a biography of F. Talbot, to be offered to the different societies in England. M. Londe presented the Society with a photograph, taken in an artist’s studio, of models arranged and attired by the painter, as a sketch for his picture. The exposure was forty-five seconds in the feebly-lighted studio with a hemispherical lens. M. Thiebaut sent a gelatino-bromide plate, with an explana tion. A small engraving was required to be reproduced the same size. M. Thidbaut wished to obtain a negative by placing a sensitive plate in contact with the engraving in a printing frame, but with three different plates of three, two, and one seconds’exposure, succeeded only in obtaining positive results. He was certain that it was not over-exposure ; but several present, after examining the plate sent, were of opinion that such was the case, and that one second’s exposure by the light of a lamp would have sufficed. M. Paul Desmabets exhibited two instantaneous pictures, taken while in a balloon at Rouen, and remarked upon the conditions under which they wore obtained. M. Renard sent two large photoglyptiques on mica (Wood- burytypes), remarking that sheets of such large dimensions were not easily obtainable. Several persons present had tried the application of gelatino- bromide emulsion upon mica, but found that it not only re quired a substratum of collodion or albumen, but split and broke too much to allow of its being employed. M. DAVANNE read an account by M. Civiale of the mode of construction ot his large map of the Alps, in which photography played an importan t part. M. Roger presented some instantaneous views taken at the distribution of « flags ” upon gelatino-bromide plates. Ualk iu tle Studin. Society for PHOTOGRAPHIXG Relics of Old London.—The sixth year’s issue of this Society will consist of twelve views of the Charterhouse—the Grey Friars with which Thackeray made us familiar in the Newcomes. The Secretary of the Society is Mr. engaged at Fort AV hippie, U.S.A., experimenting on the velocity of light. The distinctive feature of his method, according to an American exchange, is a four-sided revolving I mirror erected upon iron pillars. The mirror revolves at from । 150 to 250 revolutions a second. The light reflected upon an I ordinary mirror outside is directed through a tube and strikes ■ the revolving mirror, and is reflected across the Potomac river a distance of two miles, where it strikes a mirror on Observatory Hill. It is reflected back again, and the point upon w hich it strikes is noted by a telescope attached to a graduated scale. By this means the exact time is easily secured, and arrange ments are being made by which the velocity can be noted at much greater distance.—Engineer. The Electrical Railway.—Siemens’s electrical railway is I running constantly every day at the Brussels Exhibition, and earning a great deal of money. It runs under bridges, whisks round and over bridges at the speed of a fast trotting horse. The engine is no bigger than a tea-box, and the driver sits astride of it with the brake and contact lever in his hands. There are three carriages, each carrying six persons, seated back to back, after the manner of an Irish jaunting car. The power being greatest when the current is let on and the coils of the locomotive are stationary, there is a sharp jerk on starting. In going uphill the I current is also stronger than in going downhill, for the same । reason, namely, that there is a greater difference between the velocity of the revolving coil in the stationary dynamo-electric machine, or generator, and that of the revolving coil in the mov ing machine, or locomotive, in the former case than in the latter. The electric railway is evidently quite a success, and we observe that an experimental line is being fitted up on the Camden and Amboy Railway in New Jersey, in order to test whether the sys tem is applicable to the New York elevated railways.—The Electrician. A Paver Observatory.—The dome of the Rensselaer Poly technic Institute Observatory, at Troy, New York, is built en tirely of paper. It is reduced by pressure to the hardness of wood, and is laid on in sections one-sixth of an inch in thickness. The weight of the structure is only about one-tenth of what it would be if made of the usual materials.—Engineer. secretary. AV. J. D.—AVe have the series of photographs, and we think that they are quite worthy of exhibition—in sets, rather than singly- Robin Redbreast has certainly proved a steady sitter, and perhaps his portrait might be enlarged with advantage. But the photograph is quite a feat as it is. What a pity he ehose so dark a background ! “ Fairy-land” we consider one of the best of the series, since it is botli clear and soft; one or two ot the others have something of that “ sapless ” quality 80 inherent to dry plates. Thank you for your two hints, both OT which will appear in our “Notes” at the first opportunity- We will keep the pictures with pleasure. . A. Gordon.—Tinted albumenized paper may still be purchased, but it is little used now—at any rate, in this country. 11 is most of 1 of German manufacture. II. Gregory.—Certainly, if you will send us a print. AV. AVhitbread.—Sue our advertising columns. Mr. AV erg® can supply you with Spence’s metal. S. G. O.—See above. It melts at a temperature a little above boiling water. If you want a large quantity of it, apply to Berger, Spenco and Co., 31, Lombard Street. ' ! AV. AV.—Zinc is better than copper; it brings down the metal Ior quickly and completely; but in your case tho addition of hydron chloric acid is better. There was possibly a good deal of foretft matter or dirt in your residue, hence the discrepancy. H/" { weight you give us was all dry chloride of silver, you certain y made a bad bargain. . A. Joyce.—Tho patent expired some months ago. Everybody h* been waiting this event before taking up the process. If you Wi send us a note wo will forward it to Mr. Woodbury. , Hope.—AVe ourselves have secured a picture on a small pla through a double thickness of ruby glass held in front of tho Ion- An orange and ruby combined are, however, quite safe. The PAPee? if not in tho market, will be so very shortly. You had hot in write direct to Messrs. Mawson and Swan (soo their address our advertising columns). fivo J. Murdoch.—You must get a licence, but it only costs shillings, wo believe, to an amateur. The sample of hyposuiPbut you send is perfectly good; it is rather wetter than usual, this may be due to imperfect packing. . and Norseman.—Rub tho plate first with a little French oha", ■„ coat with normal collodion. The Autotype Company can “ Pr ) you with it as rod as you like. Both Monckhoven and Ma . . . part of water. Alfred Marks, Long Ditton, Surrey, to whom application for i T. F. Lloyd.—AVe have sent you a copy of the PiroroGnAPNT membership should be addressed. News containing all the information that has been vublished. Measuring the VELOCITY OF Light.—Professor Newcomb is
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