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The photographic news
- Bandzählung
- 6.1862
- Erscheinungsdatum
- 1862
- Sprache
- Englisch
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- F 135
- Vorlage
- Hochschule für Grafik und Buchkunst Leipzig
- Digitalisat
- Hochschule für Grafik und Buchkunst Leipzig
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- http://digital.slub-dresden.de/id1780948042-18620000
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- Band
- Parlamentsperiode
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- Wahlperiode
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- Bandzählung
- No. 195, May 30, 1862
- Digitalisat
- SLUB Dresden
- Strukturtyp
- Ausgabe
- Parlamentsperiode
- -
- Wahlperiode
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Zeitschrift
The photographic news
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Band
Band 6.1862
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- Ausgabe Ausgabe 73
- Ausgabe Ausgabe 85
- Ausgabe Ausgabe 97
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- Register Index 619
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Band
Band 6.1862
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- Titel
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anius the ganabs te of the . to me 3 still k it of fud : hat vieF, iold a pie er, a corf .it. The fraud anl 3 law. A alteration i nations far as the J why h and listt tin bene® nd to p mpropet/ I not ou! y; and, antagec) works J enhanoh sed in t ncetot irk of a ience of alteratio” le origip mn thati? introduo as from hands 0/ hem as I* hole in erior art er. Tb id. wiH>S ly mnani. at being” lifficul/" ied, but, al hes” in the mittee: ted pro?, en too • fjustic® I this Bl] uldbe t of th mment, ecently a oropose, .jl mightt’ the W :/l tide an051 3 introd’v econd5» a copy™, I 203 rtms bediend, 7 that 07 (ion o’ 4 wordh* 4 :lause 2/1 lined w‘" ofat, ire in/ 11 have2t May 30,1862.] THE PHOTOGRAPHIC NEWS. 261 against the Bill would lead his noble friend, the President of the Council, more carefully to consider its provisions, and intro duce into it those modifications of which it stood in need. Lord Taunton observed, that under the operation of the Bill, as it stood, an artist in Australia who happened to make a copy' of a work sent out to the colony might do so without knowing that the work had been registered in this country, and might, in consequence, unwittingly be subjected to all the inconve nience which the penal operation of the Bill would entail. Lord CHELATSFORD suggested that the further consideration of the Bill should be postponed to Friday. The suggestion was adopted. • Proreedings of Societies. NORTI London Photographic Association. The last meeting of this association, before the summer recess, was held in Myddelton Hall, Islington, on the evening of Wed nesday, May 21st, Mr. G. Shadbolt in the chair. The minutes having been read and confirmed, the following gentlemen were elected members of the association :—Messrs. J. Turner, Win. Cornish, and J. Sinclair. Mr. Hill presented two fine photographs from metagelatine negatives to the Society’s portfolio. Mr. G. Dawson, Lecturer on Photography, at King’s College, then read a paper on the practical working with the panoramic lens, in the course of which he exhibited the apparatus, and give practical illustrations of some of the manipulations, and also exhibited a series of prints he had taken to show the class of subjects to which the lens was peculiarly adapted, and those Which should be avoided. Mr. Dawson, having coated a curved glass to illustrate the best mode of manipulation, a conversation on the subject followed, as to the iniluence on the collodion film of supporting the plate on the tips of warm fingers, some gentlemen suggest ing, that the use of india-rubber linger stalls would be an advantage from their non-conducting quality. Mr. Dawson responded with an adage, having reference to a “ cat in pattens,” and said, he found the simplest plan was to change the position of his fingers, thus avoiding continued contact with one part of the plate. A conversation on the use of spirit levels followed. Mr. Dawson had pointed out that the camera was furnished with two, to show the slightest inclination in either direction, which "■as important in all cameras, but especially so in the pano ramic. Mr. Hill did not see any possible advantage in having two spirit levels of the cylinder form, over one of the circular shape, which would show the inclination in any direction. Mr. Shave had not either of much use, as he had seen a Samera placed considerably out of truth without the spirit level “oying it. Mr. Martin suggested that the level had not been properly Ajusted in the first instance. In order that a spirit level on a SAmera might be of any service, it was important that all the snrfaces, that of the top glass, the brass, and the wood on which * rested, should be quite parallel to each other ; and, also, that the mixture of spirit and water should be in right quantity. If meso things were attended to it could not fail to be useful. A conversation on the dilute form of developer, recommended byMr. Dawson ensued. He was in the habit, when using pyro gallic acid, of diluting the ordinary one-grain solution with five of water, in order to cover the curved glass without stains. Mr. Wharton Simpson referred to the method described some time ago by Mr. Vernon Heath, of first covering the plate With distilled water, and then adding that water to the deve- OPing solution, by which means he avoided stains and secured 8 0 development, and consequent softness. fll 1 CHAIRMAX thought it would be difficult to make the dis- 1 eu water flow readily over the curved glass, without causing stains. ‘ 5 ‘ ■ • a.Mr. SIArPsox said, of course the freedom in flowing would it U 1 asomewhat on the condition of the bath ; in a new bath Citwoud tlo 'v easily enough; in an old one, containing much nt erand alcohol, it would be repellant at first, but that would A uSe .stains, as there would be no chemical action. the st . er suggested that the use of citric acid would retard to be covered thudeveloper sufficiently to allow the curved plate reel without causing stains. Mr. Dawson said he generally found the use of citric acid rendered longer exposure necessary. A conversation on the use of dilute iron developers followed, in which Mr. Hill said, he thought that too little attention was given to the importance of increasing the quantity of acid in iron developing solutions in hot weather. A conversation on economy of water in the field, cleaning glasses, &c., followed. Mr. Hill said he used only one cloth in cleaning glasses, and that had been in use for months. The glasses, after being roughly washed, were dried with this cloth, and then a little collodion poured on the plate, and rubbed with one piece of cotton wool, and the plate polished with another piece. This old cloth, and two pieces of cotton wool had been in use a long time, and were his complete equipment for cleaning glasses. A member suggested, “ and a wash-leather to which Mr. Mill replied, “ Noand The Chairman remarked that considerable difference of opinion prevailed as to the use of wash-leather for polishing glasses. For his own part, ho considered it a most fertile source of dirty plates. Messrs. Hill and Moens both agreed in this opinion. Mr. Dawson said, Mr. Hill’s method reminded him of that of the peripatetic photographer, who moistened the plate by a very summary process, and wiped it on his sleeve (with a pantomi mic illustration). Mr. Shave asked Mr. Dawson, if he were going out again on a photographic tour, which camera and lens he would prefer to use, the panoramic or the ordinary form ? Mr. Dawson said it would depend on the class of subjects he was going to take. For some subjects the panoramic lens was pre-eminently well adapted; but for ordinary work the other was better. He was not advocating the universal use of the panoramic lens. It was a special lens, for special work. Mr. Moens suggested, that in all panoramic views where several plates were now used, the lens would be valuable. He wished to know the price of the curved glasses? Mr. Simpson believed they were eighteen shillings a dozen. Mr. Dawson regretted Mr. Koss was not present to answer questions of detail, which he did not remember ; but he had in his pocket a letter of apology from Mr. Koss, who was prevented from indisposition from being present. The chief difficulty he had met with was, the glasses not being quite true, or all of the same curve. If they could be bent perfectly to a certain guage it would be a great improvement. Mr. Simpson believed it was originally intended to do so; possibly, when they were more used, that would be done. A conversation on the difficulty of getting the glasses per fectly clean followed, in which it was suggested, that as they formed sections of a blown cylinder, if the plates were rubbed crosswise, which would be in the direction of the length of the cylinder, they would be cleaned more easily, as the fine lines formed in blowing would be in that direction. Mr. Foxlee asked how often the lens required refilling with water ? Mr. Dawson said he had only worked with it for two or three days. The first day, as he had explained, he used common water, and was troubled by the fixed air forming bubbles on the inside of the glass ; after using distilled water, he had no further occasion to change the water. Mr. Moens asked if spirit would not keep better, if the Ions were filled with it ? Mr. Simpson said, spirit would have a different density to water. The Chairman said the calculations were for distilled water; spirit, having a different density, would have a different refrac tive power. Referring to the shape of the bath, he might remark, that if the inner curve were the arc of a circle, in the slightest degree larger than the outer one, there would be no danger of injuring the film ; it might then, also, have as little depth from from front to back as might be desired. The front and back might, in fact, join at the edges, and form a crescent. A conversation arose on the (manufacture of the curved baths in glass. Mr. Dawson, having expressed a conviction that gutta-percha injured the bath, Mr. Simpson said he believed that if the gutta-percha were pure, no such injury would occur. He had left a bath for four years in one gutta-percha bath, without the slightest injury. Mr. Hill had met with similar experience. He had his bath of Burgess and Key, and believed all their’s were made of pure material.
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