The Optical Magic Lantern Journal (December 1895)

218 bluish grey. The yellow and red colours seem to be closely associated with silver bromide in a state of fine division, and the blue colour when it is in acoarseform. It does not much matter how the original negative has been developed— the granularity is not transmitted to the copy. This freedom from it is only so important on the positive. The image in all cases should bear examination with a tolerably strong magnifier without showing grain. The time of exposure has an important influence on the colour, and also the fineness of the image. If the exposure has been too brief, and the development at all forced, the quality of the image is very much deteriorated. But with a fairly long exposure, and a somewhat restrained development, we get a quality and richness of result very charming to see. There are two methods for making transparencies— one by contact, and the other by the aid of the camera. By contact, the slide is produced of the same size as the negative; by the camera the size of the negative is of no importance. We can reduce our whole-plate or 12 by 10 to lantern size with equal facility. (To be continued). — :0:—— Patent Intelligence. The following list, relating to current Patent Applications, ts compiled expressly for “The Optical Magic Lantern Journal” by a registered Patent Agent. For Surther information apply to The Patent Department, ‘ Optical Magic Lantern Journal,” 56, Chancery Lane, London, W.C. No. REcENT PaTHNT APPLIOATIONS. 19984. 23rd October, 1895. ©. A. Burghardt and G. Rigg. Improvements in a process for obtaining oxygen gas. 20539. 31st October, 1895. R. Smith. Improvements in apparatus for use in binding lantern and like slides. 14th November, 1895. Improvements in valves for cylinders employed in compressing air and other elastic fluids, 21622, RECENTLY-PRINTED SPEOIFICATIONS. Copies of the following specifications may be obtaaned by remitting 1/for each specification to The Patent Department, ‘* Optical Magic Lantern Journal,” 56, Chancery Lane, London, W.C. 22704 of 1894. Askew. Optical lantern. 22990 of 1894. Barber. Photographing, cycloramic views. Clarkson and Sparge. of compressed gases. Chase. Steropticon panorama. and exhibiting 918 of 1895. 16070 of 1896. Regulating flow The Optical Magic Lantern Journal and Photographic Enlarger. Editorial Table. Strwarp’s CaTaLocue.—A new edition has been issued by Mr. J. H. Steward of 406, Strand. It contains about 130 pages, many of which are devoted to particulars and illustrations of lanterns, jets and other apparatus connected with Jantern work. Not only does it include lanterns for ordinary projection, but also styles for scientific and other experiments. A strong feature is the adaptation of the Davenport electric lamp in connection with lanterns, both for picture projection and also for stage illumination. Copious lists of slides are also contained in this catalogue. THE LANTERN, AND How To Use It.—By C. Goodwin Norton, London: Hazell, Watson & Viney, Ltd. This 1s. book of the Amateur Photographer's Library, No. 10, contains much that is of interest to lanternists in connection with lamps, gas, cylinders, regulators, and the general manipulation of lanterns. Each subject is dealt with in an interesting and exhaustive manner. Optimus CaTALoaue.—The new catalogue issued by Messrs. Perkin, Son & Rayment, of 99, Hatton Garden, is & very comprehensive one, as it contains particulars of their lenses, cameras, dark room and flash lamps, and also of their well-known enlarging lanterns. With regard to their lanterns for projection, they have everything to suit the wants of the most fastidious. Then jets, screens, reading lamos, and connections come in for a share, whilst opera glasses and telescopes have due attention. Taken altogether the catalogue is a most complete one. TaontT's READINGS FOR THE LANTHRN.—Some excellent humorous stories in verse, well suited for juveniles, have been published by Mr. Taunt of Broad Street, Oxford. They consist of ‘‘ Hookbeak, the Raven,” ‘ Misadventures at Margit,” ‘‘Oxford Bullingdon Guards,” ‘A Capital Snip for an Ocean Trip.” and “ The Serenader's Symphony.” ANnImMa4Ls You Know is the title of an interesting reading, descriptive of 83 slides, by Mr. C. Reid, of Winshaw, N.B. It is written in an instructive atyle. Messrs. Wrst & Son, of Southsea, have sent us some fine slides of the race at New York between the Valkyrie and Defender. As announced in a previous issue, we stated that Mr. A. West had taken a trip to the States for the special purpose of taking negatives, every convenience for the same havinz been placed at his disposal. The alides include Valkyrie, the two yachts thirty seconds before the foul, and also five seconds after it, excursion steamers, and escorting the Defender after winning the cup. The subjects are very interesting, and the pictures themeelves all that could be desired, INTERNATIONAL ANNUAL OF ANTHONY'S PHOTOGRAPHIC BuLLeTIN.—The sole agents in England for this annual are Messrs. Percy Lund & Co., Ltd., of Bradford, and Memorial Hall, London. This welcome annual, which has now reached vol. viii, contains, as usual, good and practical articles, besides a host of other information, which forms excellent reading. The illustrations are fine, and are well printed. Doubtless it was @ slip of the pen on the part of Mr. F. J. Harrison, the editor, that caused the ‘ Lanternist’s Reference Table,” which he extracted from our columns, to he inserted on page 347 without acknowledgement, but as he will of course read this, he will see that i+ does not occur again, as we know that he would not knowingly have done so. PuoToagRamMs oF 1895.—This volume is a pictorial and photographic record of the best photographic