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to hand, and it differs from other photographic journals insomuch as it is written and lithographed, autographic draw ings being worked in the text, and silver prints inserted as illustrations. Not only does the Bulletin de la Societe de Versailles report the proceedings of the Versailles Society, hut it contains a useful selection of matter from various sources. A panoramic camera, devised and constructed by Captain Mossard, which is described in the first number, presents points of novelty, and we intend to describe it in an early number. Notice to SrrTEES, as SEEX in the Skylight of C. Tom linson Elmira, N.Y.—Dress your hair and arrange your toilet about your neck, just as you wish to appear. Avoid all strong contrasts of black and white, dress with taste, and your portrait will always look well. Please remember that I have not the physical or financial ability to try experiments on your various toilets, unless you are willing to pay for the extra sittings, ft will be to your advantage to leave your position to me, unless you are the better educated in art; then I will gladly defer to your superior Judgement. The Semi-Monthly Issue of “Anthony’s Photographic Bulletin.”—Under the editorial charge of Professor C. F. Chandler, and with Dr. Arthur H. Elliott as associate editor, the first number of the new series of our transatlantic contemporary made its appearance on the 10th instant. It opens with an editorial on a subject which has long—even from the time of Daguerre—occupied the earnest attention of workers, the ques tion of photography in colours. It is pointed out how those researches on isochromatie photography which have from time occupied the attention of Vogel, Abney, Waterhouse, Carey Lea, Ives, Eder, Schumann, Albert, and others, are gradually pointing to the possibility of making true photographs in colours. Let us have a sufficient series of plates, each sensitive to one tint only, and the task becomes accomplished in a certain sense, as the printing from each negative in its proper tint, and the superposi tion of the various coloured impressions, would then become practicable, if not simple and easy. Professor Chandler contri butes a chatty and agreeable paper on the history of photo graphy, dating from the time when Dr. Hooper, in his Rational Recreation, published in 1774, gave directions for copying cut out paper letters by a photographic method. It is pleasing to find the name of Mr. Carry Lea in the Bulletin, but as we report this gentleman’s communication (page 59), we need say nothing regarding it. An excellent selection of matter makes up the remainder of the number, communications from well-known American luminaries in the photographic world, copious reports of the proceedings of societies, European correspondence, and translations from the German being included. Altogether, the number is an excellent one, and Anthony’s Bulletin may be expected to enter upon a new career of usefulness with the pre sent year. Argentammonium Compounds. By A. Reychler (^Ber., 17, 2263—2266).—Ammonia is rapidly absorbed by silver citrate with considerable development of heat and a discoloration of the salt: about 4—5 mols, NH, are thus absorbed. Silver citrate dissolves readily in ammonia, and alcohol precipitates from this solution hexammonio-silver citrate as a thick syrup easily soluble in water. Silver benzoate absorbs dry ammonia to form diammonio-silver benzoate, a white substance insoluble in water. Carey Lea has described (Chem. News, 1861) a yellow crystalline diammonio-silver picrate. The power of the picrate to absorb ammonia is probably due to its nitro-groups. Ammonium picrate absorbs 1 mol. NH, at 0° to form monammonio-ammonium picrate, C ll H 3 (NO 3 ) 3 .ONH. l , NH 3 : at summer heat (about 26°) scarcely a trace of ammonia is absorbed.—Journal of the Chemical Society. Photographic Club.—The subject for discussion at the next meeting, on January 28th, will be “ Preparation of Lantern Slides.” This will be a lantern night. Visitors will be welcomed to take part in exhibiting. Uo Uottespondents. *,* We cannot undertake to return rejected communications. E. B. S.—Full directions will be found on page 338 of our volume for 1883. Brass and copper are treated in the same way. X.—The electrical retouching machine can be obtained from Geruzet Brothers, 27, Rue de 1’Ecuyer, Brussels; and the air brush apparatus from the Air-Brush Manufacturing Company, 53, Nassau Street, Rockford, Ill., United States. T. Wheeler.—More space than we can spare would be taken up by the reprint, so it is impracticable to do what you ask. The volume can be obtained by advertising for it. Mortimer Field.—We have posted on the prints as requested. Certainly they are not up to the mark, but, on the other hand, wo have seen excellent work turned out from the same establishment. No doubtyou will be able to get others done in place of them. Artist.—The best and latest information on the subject is con tained in an article which Mr. Jarman contributes to the Year- Book, p. 119. Write to Mr. Jarman at the works of the Jarman Electric Light Company, Homerton, London, N. W. A. C. A.—1. Probably you carry your development too far on the whole; but this is difficult to judge of without seeing examples of your work. We will write and suggest what appears to us the best course to adopt. 2. Naturally it is not efflorescent, and the probability is that it contains carbonate of soda. Being such a cheap material, it would perhaps be wise to throw it on one side and obtain a fresh sample. Enquirer.—Full directions will be found in “ Silver Printing,” by Robinson and Abney; published by Messrs. Piperand Carter. Alfred Davy.—The Crosscup and West Engraving Company, Philadelphia, Pa., U. S. America. Vero C. Driffield:—A short and practical series of articles on the subject shall be published before long. K. T.—Do not think too much of the reported anticipation of your idea, as it is a rare thing to meet with any such notion which has not been to some extent anticipated. You had better put the thing on the market, and if the party of whom you have heard should appear as a rival, give him a share in your own invention: He will thus enjoy the protection of your .patent, and the interests of both parties will be secured. 2. Thank you for the enclosure. "We should have been glad to have had it earlier, as we could then have made good use of it. H, Gonzalez.—1. Mr. F. C. Beach is an amateur photographer, and does not make the apparatus for sale; but the description is so clear that any maker of photographic apparatus can construct it for you. 2. Perhaps you arc not sufficiently careful to guard the paper against diffused light. M. Capfblli. — From what you say, we are inclined to think that the markings are duo to traces of fatty matter in the gelatine. This often forms a scum on the surface, and gives rise to such markings as you describe. Wash the flakes of gelatine with ether, or try another sample. G. W. G.—The ■ instrument you refer to is a very useful one, and probably the modification you suggest would make it still more useful. A description is to bs found on page 791 of our last volume. W. W. P.—Probably the mounts contain hyposulphite. Sze Notes on page 56. H. Whitfield.—1. One reason is because you have not yoursel f undertaken the task. 2. It can bo had through any foreign book seller. 3. All the parts hitherto published have been reviewed in the Photographic News. R. Blakelough.—The slides are fairly good on the whole, but differ widely in character. We can hardly make any suggestions likely to be useful to you without having details as to the methods you have tried. What shall we do with the slides ? F. R. F.—1 (a). As close as it is practicable to put it without making the illumination unequal—let us say, six inches in an ordinary case, (b) About eight inches in diameter; but there is no reason why it should not be rectangular, and of the exact size of the negative, (e) Close together, or with an interspace of about half-an-inch. 2. (a) Yes, unless the box is large, and the air ways are left very free. The larger the box is the better, the only limit being the inconvenience of working with one of very large dimensions. We suggest sixteen inches high, twelve inches across, and nineteen from front to back. An eighth-inch reflector will serve, and you must find the best position by trial, (b) An Argand gas burner may bo used, but it is not quite so efficient; that is, not so rapid in its action. H. E. M.—Thank you for the cuttings. It is no uncommon thing ; but to notice it would be to give a fres advertisement to the publi cation in question. It is a journal built up almost entirely of matter appropriated without acknowledgment. Uhe Abotographi Hlews. SUBSCRIPTIONS. Including Postage to any part of the United Kingdom:— Yearly ... 15s. Od | Half-Yearly ... 7s. 8d. I Quarterly ... 3s. 10d. To the United States, the Continent, ana the Colonies :— Yearly ... 17s. 4d. | Half-Yearly ... 8s. 8d. | Quarterly ... 4s. 4d. To India (Yearly) 19s. 6d. ADVERTISEMENTS IN COLUMN. Not exceeding Five Lines (36 words)... 3s. Od. Each Additional Line Os. 4d. Repeated insertions, and special positions or style, by contract.