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III.—Applications. The applications of this process are very numerous. I will ai present merely allude to a few of them :— I. We obtain pictures on glass, in carbon, or other pig ment, by simply mounting the exposed tissue on a clean glass plate and developing the picture, merely backing it with another glass plate for transparencies, and with paper or plaster for pictures to be viewed by reflected light. There is no transfer, and no cement. The picture is not inverted, being viewed through the glass. 2. We obtain pictures on opal glass, porcelain, panel, pre pared canvas, prepared paper, &c., directly and without trans fer; but the pictures are inverted if ordinary negatives be used. 3. We obtain non-reversed pictures on paper, which may be boiled in water and rubbed like linen, by mounting the exposed tissue on a temporary support, such as a plate of metal or glass coated with a fatty body, and, after develop ment, transferring the print to paper by simple contact, by means of the shellac cement. IV.—Manipulation. The manipulation is of a very simple character, but more easily shown than explained.* PHOTOGRAPHY IN INDIA. BY CAPT. E. D. LYoN.+ I have much pleasure in submitting for your inspection a collection of photographs taken by me in different parts of Southern India, by order of the Government. The whole series consists of about 400 negatives, many of which have never yet been printed. The time occupied in the taking of these was about seven months, during which I travelled nearly 5,000 miles. To give any idea of the difficulty of locomotion in such a country is hardly possible, except where the railways have hero and there been made. The bullock-carts, both for yourself and luggage, are the only means of conveyance. Roads, though nominally existing, and marked on maps as such, are, in very many instances, things of the past, the bridges alone indicating where they ought to be ; and the unhappy travellers, boxed up in a coach drawn by bullocks, think themselves lucky if they accomplish two miles an hour; in fact, I have often been twenty-four hours in travelling twenty-five miles, without one spot in which it would bo possible to halt, or a tree to shelter one from the blazing sun, the natives at one time lifting the machine over a mud wall three feet high, and at another dragging it through the muck of a rice-field three feet deep. The destruction to every kind of photographic materials under these circumstances I leave you to imagine. But, distressing as locomotion is in such a country, it is nothing as compared with what one has to undergo when i endeavouring to photograph, exposed to the full rays of an Indian sun, as one must necessarily be, for six to seven hours at a time, the ground so hot one can hardly stand on it for the time necessary to expose a plate, the glare so great and the shadows so black, that to get detail seems almost hope less; and yet, under the circumstances here detailed, one is expected to produce photographs at least equal to those at home, and all the credit one gets is to hear, from the highest to the lowest in the land, the one and the same remark, “ Oh, yes! the sun is so bright and the light so good, any one could photograph in India.” All I can say is, I only wish they would go and try. I have said enough • It was Mr. Johnson’s intention to proceed, after reading his paper, with a practical demonstration of the process. In his absence through illness, the paper was read by the Secretary, and the demonstration was promised for the June meeting.—Ed. t Read before the Photographic Society of London, May 10th, 1869. on this point, and will only add a few words on the photographs. They arc produced by the ordinary wet process, such as you are all acquainted with. But honour to whom honour is due; and I feel bound to bear the very highest testimony to the lenses supplied to me by Mr. Dallmeyer. The one I used first, and with which nearly all the interiors were taken, was his triplet-group lens, for 12 by 10 plates. The photographs speak for themselves so eloquently of its merits, no words are needed from me to bear testimony to its super lativeexcellence. Then I received the wide-angle rectilinear, and from what I saw of its powers I christened it, the first day I used it, “ The Little Wonder,” and never, I think, was a name better applied. It certainly has a power of rendering dark shadows, and, notwithstanding the immense angle it embraces, giving marvellous definition to the extreme edges of the plate, in a manner that, I confess, astonished me quite as much as it delighted me. As to chemicals, Thomas’s pyrogallic is deserving of every commendation; it is the only sample which will keep good in India; all others turn black, even during the passage out. As to collodion, I have tried all, but cannot say I am quite satisfied with any. Most of the pictures you see are taken with Mawson’s, a few with Huggon’s, and a few with Blanchard’s ; but all have the one fault that only one bottle out of four or five will give an even film, free from reticulation in the heat; and the more you dilute it the worse it gets. But when you do get a good bottle, it can be used almost to the last drop without any dilution. Ogrrespouence. WET PHOTOGRAPHY WITH AND WITHOUT A TENT. Sir,—Having now completed my new tent, and tried it, I forward a few particulars of the size, &c. When closed for travelling it is 222 inches wide, 17 inches high, by 7 inches from back to front; when opened it affords working room 22 inches by 18 inches, which is ample for 8} by GJ plates. It weighs, when empty. 8 lbs. 2 oz., and when full and containing all requisites for 9-7 by 4} plates the weight is 16 lbs. 5 oz. It can be erected and fit for use in a couple of minutes, and packed up again in as short a time. Now the dry-plate worker must carry at least four double dark slides, or a plate box with changing bag, or something of that kind ; these must weigh 5 or G lb., so the wet-plate man has only 10 or 11 lbs. extra to carry when working small plates such as I have named. 1 have been much interested in reading the accounts in the News of Mr. Whiting’s apparatus, particularly as I have often tried a dipping bath for developing plates, and never succeeded ; but, on referring to Mr. Barrett's excellent description of his apparatus and mode of working, I find that he recommends a neutral silver bath, and in this small matter perhaps lies the whole secret. Should I, upon another trial, find that I can use a dipping bath for developing successfully, 1 anticipate a most happy future for open air operations with a tent. The methods employed by Mr. Barrett and Mr. Whiting are open to one serious objection, the difficulty of coating a plate properly in the open air, for by the sea side a little wind and dust arc constantly on the move more or less, and inland the same, except on rare occasions. It also involves that the camera must be level, and this is not always possible, and in many situations there is room only for the camera; but the inventions are not the less ingenious, if not under all circumstances practical.— Yours truly, Thos. Gulliver. May Idth, 1809.