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Mr. H. Smith showed a camera slide and camera stand of his own making. The slide is constructed so as to allow a carrier, containing two plates placed back to back, to be inserted. Any number of carriers might be used, and, by means of a bag, the plates changed when out in the field. It was suggested that a changing-box made with grooves for these carriers to fit in would act with greater certainty than having to transfer the glass plates only, as in the present form of changing-boxes. Mr. A. Coventry exhibited a new drying-box he had made, and referring to one he had shown previously, in which the air travelled over the plates one after the other, explained that the top ones were very much longer in drying, which he found objectionable. In the new box— which con tains fourteen shelves capable of holding fifty-six quarter-plates, or fourteen of 9 by 7 inches—the opening at the bottom for admission of air, and the outlet at the top, are about equal. At the .back of each shelf is an opening one-fourteenth of these. On the top is a chimney five or six feet high, with Bunsen burner. The air enters, passes over the plates into a chamber at the back, and is carried off by the chimney, the result being that the plate on the top shelf dries as quickly as the one on the lowest. He had lately been using common soda with the sulphite developer with great advan tage, as plates developed with it were very clear which, on using ammonia, would only give gteen fog. Mr. J. Schofield also said he had had plates giving green fog with using ammonia in the developer; but the same plates with ferrous oxalate were all that could be wished. Mr. W. J. Chadwick showed a camera and slides for taking pictures 34 by 34 for the lantern. Votes of thanks having been passed to Mr. Coventry and the other contributors, the meeting was adjourned to May 10th, when Mr. J. Dale will read a paper “ On the Recovery of the Materials used in the Ferrous Oxalate Developer.” o Galk in the Studio. South London Photographic Society.—At the next meeting, to be held at the House of the Society of Arts on Thursday, May 3rd, at eight o’clock, Mr. F. A. Bridge will read a short paper on “ Lenses, Cameras, and Stands for Small Work.” Mr. W. Cobb will read a paper on “ Photography from a Balloon.” The following, from the question-box (postponed from last meeting) will also be discussed : “ When large pictures are required, is it better to take them direct, or to take small negatives, and then enlarge them?” Mr. E. W. Foxlee, Mr. G. Smith, Mr. W. Brooks, and several other gentlemen have promised to take part in the discussion. Old London.—The Society 1 or Photographing Relics of Old London pursues its useful labours, finding, as it would seem, in exhaustible objects of interest in a city which is popularly sup posed to be somewhat wanting in picturesque associations. The ninth year’s series, which is about to be issued to subscribers, numbers no fewer than twelve large mounted permanent photo graphs, admirably executed, comprising four views of Lambeth Palace, including the Gate House and the so-called “ Lollard’s Tower.” The remainder are interesting specimens of domestic architecture in Aidgate, St. Mary-axe, Cheapside, Bloomsbury, and Soho, most of which are probably doomed now to disappear. Mr. Henry Dixon is the skilful photographer entrusted with the work. The Transit of VENUSCEXPEDITIOX to South Patagonia.— Messrs. D. Cussons and Co. forward us some photographs of the encampment in South Patagonia of the American observers who were stationed there on the 6th December last. The desolation of the region is well summed up in the statement that “ for thirty miles round there was not herbage enough to feed a goat.” Safe Photography.—A correspondent is good enough to send us a collection of pictures printed in platinotype, depicting a series of Messrs. Chubb and Co.’s iron safes. This firm, it appears, like many others nowadays, largely employs photography for describing their wares. At the Metropolitan County Court of Westminster, the case of Taylor V. Corbell was heard before Mr. Judge Bayley, in which the plaintiffs, a firm of photographers in Regent Street, sued the defendant, one of their travellers, to recover the sum of fourteen shillings odd, being for the balance ofi an account for some portraits which the defendant had obtained and had been paid for._Mr. Whitten, in the employ of the plaintiffs, proved the order for the pictures, and produced a letter in court from the defen dant, in which the defendant had sent two different sums of twenty-five shillings each of the original account, but denied any further liability, as he had paid the balance to the plaintiffs’ clerk. The defendant said he worked on commission for the plaintiffs, and had, after deducting his commission, paid the plaintiffs’ clerk everything that was due. He was not able to produce the clerk, as he had left plaintiffs’ employ. At this stage of the case thelearned judge said, that in the absence of the clerk the plaintiffs’ books could not be considered evidence of a debt; he should therefore nonsuit the plaintiffs in common law, leaving them the option of bringing a second action against the defendant if they could find their clerk who had received the money, or adduced any further evidence. Photographic Club.—At the next meeting of this Club, May 2nd, the discussion will be “ On Focussing.” G0 Gorresgomeuts. *** We cannot undertake to return rejected communications. A. H. L.—1. We should recommend you to have as many dark slides as will suffice for your day’s work. 2. The first mentioned. 3. Enough to make it just faintly acid, say two to four drops with each ounce of solution. 4. A mixture of one part of strong nitric acid with three parts of hydrochloric. 5. Any maker of photographic apparatus would construct it for you. EYESIGHT.—1. The lamp cannot be improved, but you will find it an advantage to work with closed eyes, excepting when you have actual occasion to observe. 2. We have used them, and found them satisfactory; but we have not any doubt that many others might be used with equal advantage. A. G. B.—The iron is converted into the condition of a ferric salt. Do not tinker with it, but throw it away and make a fresh solution. Opal.—If the plates are gelatino-bromide, there is no silver to recover; but if you refer to the collodion process, it will be suffi cient to allow the waste liquors to flow into any convenient receptacle, and the silver will be completely deposited in a few days. A. Singer.—The context indicates that it is, as you suppose, a misprint. R averse the order as far as that particular sentence is concerned. A. Borland.—We have sent it to our wood engraver, and he will report next week Holcombe.—1. We will endeavour to obtain the particulars you refer to. 2. It is in German, and we are quite sure that there is no translation ; neither is there likely to be one. 2. The old plate process is still in general use. Hanco.—It is probably the pyroxlin that is wrong; try another sample—one which feels more rotten when pulled with the fingers. J. B.—1. Immerse both print and glass in a bath of weak gelatine solution, draw them out together, and bring them fairly into con tact by stroking downwards with a squeegee. The squeegee consists of a strip of tolerably stiff india-rubber mounted in a groove, planed in a wooden rule, so that the rubber projects to the extent of about one-fourth of an inch. 2. No, it is the most suitable medium, as far as our own experience goes. One in Trouble.—1. The publisher is Mr. E. L. Wilson, 912, Chestnut Street, Philadelphia; but as it will be some weeks beforeyou can obtain a number, we shall have pleasure in posting you one if you will forward your address. 2. We imagine the chances are about equal in both countries. 3. There is no such book, but articles on the subject have appeared in the Photo graphic News from time to time. McDonald.—1. Use an extra thickness of ruby glass. 2. Hydro fluoric acid will dissolve it readily. Lennox Browne and Emil Behnke.—Your communication arrived too late for this week. Canvas.—It is not very easy, as the greasy nature of the film prevents aqueous liquids flowing readily. You had better make a fatty transfer by Asset’s method (see Leader), and impress it on the canvas. A. L. M.—If for landscapes alone, you cannot do better than get a simple view lens ; but if, on the other hand, you wish to take architectural subjects as well, you had better obtain a doublet of the rectilinear or symmetrical type. C. Talford.—1. It is extremely probable that you have allowed the temperature to rise too high; it is not desirable to heat it much above 110°F. 2. Emery consists essentially of roughly crystallised alumina, the iron being of the nature of an impurity. 3. Dilute with ten times its volume of water, and then add about an ounce of alcohol to each pint. 4. Plain Rives paper is very suitable ; but if you were about to work on a larger scale, it would answer your purpose to look out for a cheaper material. Pyro (Barnes).—1. It arises from the circumstance that a chlor ide of silver is soluble, to a notable extent, in a strong solution o an alkaline chloride.