The Optical Magic Lantern Journal (December 1890)

the poets. 68 The Optical Magic Lantern Journal and Photographic Ealarzar. And will some of your readers mention their experience in the matter of the limelight microscope, specially as to objects shown and mode of showing living specimens? The frog must need a special support when its capillaries are shown.— You will oblige, yours truly, Carey Coomss, M.D. +0: Society Meetings. CAMERA CLur.—On Thursday, October 3oth, an exhibition of lantern slides was held at the Camera Club, members and friends bringing up over two hundred slides for the occasion. bition was the result, several classes of work being illustrated. Mr. Williams contributed landscape scenes, Mr. White and Mr. Lardeur microscopic subjects, Mr. Griffiths some very effective subjects taken in East Anglia; Mr. Howlett pictures, including an excellent view of the Houses of Parliament, and Mr. Chang, hand camera views. Other slides were con tributed by Messrs. Laurie, Greene, Sands, and Wel! lington. On Thursday, Nov. 6th, Mr. Gale read a paper, entitled “Country Rambles with a Camera." Mr. Frank Howard occupied the chair. There was an excellent attendance, and a very interesting lecture was delivered, illustrated by agreat number of lantern slides. Mr. Gale commenced his address with notes concerning some of his favourite counties, and then the part of the photographer. The heads of his subject were cottages in landscape, their styles and the material used in their construction, river scenery, country ponds, commons, ploughing, harvesting. The questions of “ Figure in Landscape ” and “ Lighting ” were also discussed and illustrated on the screen, and the lecture throughout was adorned with extracts from In the discussion the Chairman, and Messrs. Hussey, Humphery, Wilkinson, Greene, Davison, and Maskell spoke, and at the conclusion a vote of thanks to the lecturer was carried by acclamation. On Nov. 13th, Mr. Bevan gave a description and demonstration of Messrs. Greene, Cross, and Bevan’s primuline or daizotype printing process. Ca t. P ype p &P P Abney occupied the chair. hon. secretary handed round a photograph on a gelatine dry plate in colours, the work of Mr. Wormald, jun., of Sutton. The colour photograph had been printed from a chromatrope and showed the design in fairly bright blue, red, and yellow, with acertain amount of fog throughout. Capt. Abney pointed out that there was nothing new inthe production. He had often obtained the same results, and the colours would be found to fade. first saw it, the plate having in the meantime been exposed for two days to daylight. Dr. Patterson exhibited a very useful lantern-slide printing frame introduced by the Platinotype Company, and Mr. Corbould showed and described very effectively | Hume's cantilever enlarging apparatus. Mr. Bevan fully described and demonstrated the primuline process of printing, illustrating his remarks throughout with many examples. On Thursday, November 2oth, Mr. Pringle gave an address on ‘“‘ Some Old Processes of Making Lantern Slides." Mr. H. M. Elder, M.A., occupied the chair. Previous to the lecture Count Primoli, of Rome, handed round a large and excellent Mr. Clark said that the picture ap; peared to him to have faded in the few days since he , Previous to the lecture the ! series of instantaneous photographs and other work of his own production. An exceptionally interesting one represented an indoor function with the Pope seated in full ceremony. This had been given ten seconds, detective fashion, but the figures during the time had not moved. Mr. Pringle, in his lecture, commenced by gainsaying assertions to the effect that lantern slide pictures did not come within the domain ofart. He insisted on a highscale of lighting, clear shadows, and warmth of colour. He sportively suggested that the screen pictures could easily be made | as naturalistic, or as definite, as the spectator liked, A very varied exhi; by varying his distance from the sheet, and if rough surface was the aim, then all that had to be done was to use a good fuzzy travelling rug as a screen. He then proceeded to give the formulz, working details and distinctive characteristics in connection with several old processes, dry collodion, wet collodion, collodio-albumen, &c., and he illustrated his remarks by exhibiting on the screen comparative slides in the several processes. Some discussion followed, Messrs. England, Wellington, Humphery, Cembrano, and the Chairman taking part therein. . BATH PHOTOGRAPHIC SOCIETY.—The first ordinary meeting after the recess was held at the Royal Literary and Scientific Institution, on 6th November, Mr. W. Pumphrey, president, inthe chair. Mr. F. J. Saunders | was elected a member of the society, and the election proceeded to urge the necessity for observation on j of Miss Pearcy and Mr. A. Hinton Jones by committee was confirmed. Mr. Friese Greene read a paper, entitled “ A description of a new machine for printing and illustrating a paper by photography alone, at the rate of fifteen to eighteen thousand an hour.” This ingenious machine was then set working ona spool of coated paper, and the rapidity of its exposing capabilities shown. Another apparatus for rapidly printing the copies was also shown, as well as bands of celluloid negatives and positive paper prints. These were Said to have been produced at the rate of five exposures per second of time. Mr. Greene drew attention to an effective spirit lamp for burning given quantities of magnesium powder at brief intervals, and a bijou lamp in which a small wax taper fired the powder as required. During the demonstration a member arranged a camera in the hall and obtained a fair negative of those present. The Chairman thanked Mr. Greene for his paper and the trouble of coming from London to show this machine in public to their society first. He said they were amazed to hear that positives might shortly be obtained therewith from positives. The details of this process, he hoped, would not long be delayed. They were also indebted to Mr. Greene for showing those very compact forms of lamps for the combustion of the metal magnesium. Mr. W. Middleton Ashman enquired of the lecturer the kind of light and the sensitometric value of the films used in producing prints at the rapid rate stated. He also wished to know the ratio of speed the new salt named primuline had to the silver haloids prepared for a high degree of sensitiveness to light. Mr. Greene, in reply, said he used gas light for the bands of prints shown, and the sensitive surface was most rapid. Primuline was much lesssensitive to light, but could be accelerated by an admixture of silver nitrite. The chief advantages he found in being able to produce positives direct from positives. The Chairman mentioned that Mr. C. H. Talbot had presented to the society a copy of the