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The photographic news
- Bandzählung
- 27.1883
- Erscheinungsdatum
- 1883
- Sprache
- Englisch
- Signatur
- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
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- SLUB Dresden
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- Public Domain Mark 1.0
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- urn:nbn:de:bsz:14-db-id1780948042-188300004
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- http://digital.slub-dresden.de/id1780948042-18830000
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- oai:de:slub-dresden:db:id-1780948042-18830000
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- LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 1271, January 12, 1883
- Digitalisat
- SLUB Dresden
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Zeitschrift
The photographic news
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Band
Band 27.1883
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- Titelblatt Titelblatt I
- Register Index III
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Band
Band 27.1883
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- Titel
- The photographic news
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THE PHOTOGRAPHIC NEWS. SI JAXUARY 12, 1883.J Captain Abney referred to Darwin’s book on the expression of v the emotions, and mentioned a set of heads, all photographs'of 1 the same young lady, yet so unlike that it was difficult to believe t that they were not from different models. 1 Mr. WARNERKE described a set of pictures of individuals pronouncing certain sounds which so forcibly suggested these 1 sounds that the spectator involuntarily repeated them. Mr. FRANCIS Eliot said it was doubtless advisable to get a • characteristic expression ; the difficulty was to know which was the characteristic expression. 1 In reply, Mr. Peek mentioned that a certain eminent photo- I grapher was in the habit of asking his intended sitters to break- ] fast with him, so that he might study their expressions. Mr. WARXERKE showed a new form of lime light, the invention of M. Kchotinsky. The peculiarity consists in the burner, which is vertical instead of horizontal, the flames shooting upwards ; and in the use of a special hard magnesia pencil, the flame im pinging on the end of it. Common coal-gas and oxygen are used. The light will burn for three hundred hours without adjust ment. In Russia, where oxygen is specially prepared cheap, it costs less than coal-gas for the same amount of light. An interesting discussion followed Mr. Warnerke’s demonstra tion. The President announced in the course of the meeting that the Progress Medal had been awarded to Mr. Woodbury for his Stannotype process. The Annual Lantern Meeting oe the South London Photographic Society. On Thursday, the 4th inst., an unusually large number of members and their friends assembled at the Hall of the Society of Arts, and after the formal business of the evening had been trans acted, the Rev. F. F. Statham (Chairman) invited Messrs. Bridge and Brooks to proceed with the exhibition of the numerous slides which had been sent in. The lantern used is the very fine triple instrument which is already familiar to the photographic public, each objective being actually mounted on a small bellows camera, these cameras taking the place of the rough tin cones which are ordinarily used for lantern purposes. We understand, however, that Mr. Brooks has notably improved the objectives by some novel combination of lenses. The optical lantern was placed back close to the clock, and a clear disc of no less than 25 feet in diameter was projected on the screen, this diameter being, however, reduced to 18 when a normal slide was in position. The quality of the pic tures shown was excellent, as were also the optical arrangements and the facilitv with which the manipulations were conducted. The contributors of slides were Messrs. F. Beasley, Jun., F. G. Short, J. 0. Cohen, Jno. Nesbit, W. Brooks, F. A. Bridge, J.' 0. Andrew, M. Whiting, A. L. Henderson, F. Howard, J. Gale, C G. Cutche’y, Sciopticon Co., W. J. Wilson, Dr. C. White, P. H. Fincham, W. M. Ayres, E. Dunmore, Dr. Huggins, F.R.S., and F. York. Mr. F. A. Bridge undertook to describe the slides exhibited, while Mr. W. Brooks presided at the lantern, and several friends added to the evening’s enjoyment by vocal music. Mr. Bridge also performed on the piano. Mr. Valentine Blanchard was among the vocalists. with about one ounce hydrochloric acid to the pint of solution. When placed in the dish, the negative was perfectly clean, and there was no chance of its being splashed by any other solution ; he attributed it to dust or other impurities in the alum. The Chairman thought they looked like spots caused by bubbles in the developer. Mr. Coles thought this could not be the cause, as the plate was perfectly clear till placed in the alum solution. Mr. Debenham said a question had been asked at a previous meeting, why any emulsion spilt cn the back of a plate deve loped up black ? He thought the solution was, that when the plate was placed on the slab to level, any dirt on the slab was taken up by the emulsion on the back, which, when developed, would give green, red, grey, and ultimately black fog, as it was well known if there was any dirt on the plate it always deve loped fog. Mr. W. K. Burton said that if a plate was thoroughly cleaned back and front, hand-coated, and placed on points to level, the emulsion at the back would develop as clean as the front. Mr. Henderson said if an emulsion was prepared with an ammonia nitrate solution, the results would be entirely differ ent to a batch in which the same quantity of free ammonium was added to the gelatine and bromide first; in the latter case, if only a small quantity (say about one ounce) of the ammonium was added, and the ammonia gelatino-bromide added to the silver, the emulsion was of a darker colour, presumably contain ing oxide of silver of great density and rapidity, but was other wise somewhat difficult to work, especially during development, owing to the dark colour of the film, which, when fixed, how ever, was perfectly clear ; he thought that plates prepared from an emulsion so prepared would, owing to their dark colour, be less likely to give halation. It was announced that Mr. W. K. Burton would demonstrate his precipitation process at the next meeting, when he would be pleased to answer any questions asked him, and endeavour to explain any difficulties encountered in working same. PIOTOGRAPMERS’ Benevolent Association. On December 27th, a special meeting of the Board of Manage ment was held for the purpose of considering an application for assistance. The sum of £5 was granted. On the 3rd inst., the Board held its usual monthly meeting at 181, Aldersgate Street. The minutes were read and confirmed, after which Mr. S. O’Reily was elected a member of the Asso ciation. It was decided to hold the Annual General Meeting on Wed- , nesday, 24th inst. The chair will be taken by W. S. Bird, Esq., , at 8 p.m. Members are requested to make an effort to be pre" , sent, and all friends are cordially invited. Glasgow Photographic Association. This Association met in the Religious Institution Roc ms, Buchanan Street, on the 21st ult., Mr. Parker in the chair. After the transaction of general business, and replying to the questions in the Question-Box, a paper on “ Carbon Printing” was read by Mr. J. 0. Annan (in our next), to whom a cordial vote of thanks was passed. London and Provincial Photographic Association. At the meeting held in the 4 th. inst., Mr. A. Cowan (who presided) exhibited a box for keeping dry plates in the dark room, constructed similar to one described in the Photographic NEws of 8th ult., by Schwartz. The box was of wood, the joint being double rabetted, and it was made to take two batches of plates being divided in the centre ; the plates are laid one on the other flat in the box, narrow strips of card being placed between each, four uprights of wood in each half of the box serving to keep the plates from shifting, and enabling the operator to easily lift them out by placing the hand across the plate. Mr. Brown showed a plate developed with ferrous oxalate, and. showing green fog ; it was an under-exposed plate, the emulsion being prepared by placing the silver in the gelatine first, and then adding the bromide ; it was allowed to remain in the developer about six hours. Mr. Coles passed round a negative covered with small round spots which he said only appeared on the plate when left all night in a flat dish containing a saturated solution of chrome alum Ualk in the Studis. Professor Tyndall on Light and Mining Accidents.—At the Royal Institution, Albemarle Street, on Saturday afternoon, Professor Tyndall delivered a lecture, intended for juveniles, but at the same time largely attended by ladies and gentlemen, on the subject of “Light.” First of all he showed a beautiful spectrum display of colour upon a screen, and then illustrated that a piece of red flannel put in front of the colours on the screen—that is, between the screen and the apparatus—destroyed all other colours except the red, which was visible upon the flannel in the darkened chamber. Pointing out, however, that nothing was annihilated in nature, the lecturer indicated that the intercepted light was converted into heat upon the flannel. He further pointed out that heat extended beyond the visible spec trum, although not such as to excite vision. It was possible at the same time, as he made clear by experiments, to obliterate the I luminous rays by interposing dissolved iodine. 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