The Optical Magic Lantern Journal (April 1899)

The Optical Magic Lantern Journal and Photographic Enlarger. gasometer and the burners. When emptied the tap can be closed and Rr again opened, 80 as to admit water to the carbide chamber. The gasometer, we may mention, is guided on the rodsHH. We find that the best quantity of carbide to use is exactly three-quarters of a of 00000 size, gave a good and steady light for 13 hours, and during that time there was no over-production of gas beyond the capacity of the gasometer. The two burners which we used carbonised a good deal, and it became necessary to remove the lump of carbon occasionally. There is one point, however, which, according to the instructions supplied by | the makers, we do not agree with, and that is the claim that ‘‘ when the tap R is turned off gas ceases to be generated, and the apparatus | can be set away until required again.” It is | well known by users of acetylene that the | moisture present in the lime below the carbide is sufficient to permit of the slow generation of the gas, and when trying this we found that the | apparatus could only be stopped for about 20 | ' tions, is compiled expressly for the minutes, as by that time sufficient gas had been generated to fill the gasometer. good and the apparatus well made. TITLE AND NOTICE SLIDES. Mr. W. A. Winter, of Hatton Garden, who | works exclusively for the trade, has introduced some excellent styles of slides for notices, lecture titles, and cinematographic announcements. The lettering, which is bold and plain, is contained within floral designs. Some new and startling designs of rackwork slides have also been brought out by Mr. Winter. BRITISH LIME CYLINDER COMPANY. MANUFACTURING At their well-fitted premises (51, Turnpike Lane, Hornsey, London, N.) a number of hands are employed in cutting, roughing, drilling, turning, and packing limes for the use of the lanternist. When entering the premises we were agreeably surprised to see that branch of lanterndom catered for so extensively. We inspected lime in the rough, saw it brought into shape, and eventually tried some lime cylinders on our own jets, and found them to stand well and emit a pure white light. pound, and this, with two Bray’s burners each | without previous washing, and ' undue hardness. We are well | pleased with the behaviour of this generator — throughout, and consider that Mr. Hughes has © a good thing in it, especially as the workman| ship is excellent and all parts finished off in | good style; in other words, the principle is | | 3285. ; 3858. 55 VICTOR FIXING SALT. This salt, for which Messrs. Fuerst Bros., 17, Philpot Lane, E.C., are agents, is intended to take the place of hypo for fixing. It quickly dissolves in water, negatives may be fixed this does not discolour. the solution. With pyro-soda developer and this fixing salt we obtained clear blackish negatives of great beauty without The proportions of this salt required for making a fixing bath are Victor fixing salt 2 0zs., water 25 ozs. 8 PATENT INTELLIGENCE. The following List, relating to current Patent Applica“ Optical Magic Lantern Journal" by W. P. Thompson & Co., Patent Agents, of 322, High Holborn, London, W.C., to whom all enquiries for further information should be addressed. REcENT Patent APPLICATIONS. 14th February, 1899. Arthur Freemore Spooner. Improvements relating to coin-freed and etereoscopic apparatus. (Eugene Hannan and Ernest Gauthier, France.) February, 1899. Henry Abbey Brown. Improvements in and in means or appara tua for producing and exhibiting kineto scopic and like pictures. 17th February, 1899. Matthew Wheldon Aisbitt, James Millerand William Jones. Improvements in lamps or lanterns. Q1et February, 1899. Victor Powers. Improvemente in acetylene and like lamps and generators. 93rd February, 1899. Alfred Miles. Improvements in or relating to apparatus for taking and exhibiting moving objects in motion. 23rd February, 1899. Francois Joseph Bourgeois. Improved non-explosive acetylene lamp. February, 1899. Ladislaus Emanuel Gravichstadten. Improved means and apparatus for exposing photographic and like views cinematographically. 95th February, 1899. Charles Swiers Lumley, Thomas Knight Barnard, and Frederick Gowenlock. Improvements in photo-chromo atereoscopes, also applicable to cameras. Complete. o7th February, 1899. Franzia Windham. Acetylene lamps. 98th February, 1899. John MHenry Stone. Improvements in lanterns and amps and _ burners therefor. lst March, 1899. Henry James Thatcher. Improvements in or relating to binoculars or eyeglasses, spectacles and the like. No. 3274. 14th 3548. 4024. 4043. 4141. 24th 4164. 4255. 4433, 4492.