The Optical Magic Lantern Journal (September 1900)

The Optical Magic Lantern Journal and Photographic Enlarger. 115 of the 3-plate size. It is made for the most part in aluminium, has a B.R. lens, can be loaded in daylight, is replete with all the latest fittings and improvements, yet folds up into very small compass. Messrs. Kodak, Limited, inform us that at the request of a large number of dealers they have decided to put their paper films on the market in the form of spools. The negatives obtained on these films give good results on Dekko or bromide papers, the effect being soft. LUMIERE’S PORCELAIN PAPER (PATENT). Messrs. L. Gaumont & Co., Cecil Court, Charing Cross Road, W.C., are placing this paper upon the market in this country. The principal advantages claimed for it are the extreme beauty of the whites and blacks and the rich gradation of tints.’ The instructions are as follows:—Expose the negative and paper to gaslight as for ordinary bromide paper, length of exposure varying according to the density of the negative. To develop, plunge the paper first of all for 20 or 30 seconds in pure water, then place face upwards in a dish, and flood the developer over the surface at one sweep. As soon as the image acquires sufficient vigour, which is examined by transparency, it must be quickly washed in plenty of water, then immediately placed in the fixing bath, where it may stay about 10 minutes. The subsequent washing should be for at least three hours in running water. The prints can then be hung up to dry. After a further immersion of 10 minutes they can be mounted. DEVELOPING Batu. (To be prepared at the moment of use.) : : 100 parts or c.c. 15 parts or grammes. 5 parts or grammes. Water : : Auhydrous sulphite of soda .. Dianol (diamidopheno!) 5 per cent. solution of bromide potass. ae «+ 5) 10 parts or grammes, Frxina Baru. 1000 parts or c.c, 200 parts or grammes. 10 parts or c.c, 2 parts or grammes. Water .. = ae Hyposulphite of soda Bisulphite of soda Ordinary alum NEW SLIDES BY YORK AND SON. The thirty-first annual supplemental catalogue of Messrs. York & Son, the well-known lantern slide producers, of 67, Lancaster Road, Notting Hill, W., has just been published. As usual, it is up to date. It gives particulars of 70 slides of the Paris Exhibition, 50 slides about Holland, 60 of China and the Chinese. The Transvaal in war is a very large section, and is divided into five distinct sets as follows :—1 to 50, 51 to 100, 101 to 150, 151 to 200, 201 to 236; but in a short time this last set will be made up to 50, when set 6 will be commenced. There is also a good and interesting set of 43 slides on Baalbec. Particulars are also given of photographic slides of trees, flowers, etc., blossoms, and hoar frost scenes. As usual, life model sets are to the fore, Off to Klondyke, The Erndales (temperance), Teddy’s Button, The Laughter of Fools, and others. Messrs. York's slides are always of the highest class. : 0 :——-— —Oe— 8 PATEN The following List, relating to current Patent Applications, is compiled expressly for the “ Optical Magic Lantern Journal” by W. P. Thompson d: Co., Patent Agents, of 322, High Holborn, London, W.C., to whom all enquiries for further information should be addressed. No. REcENT PaTENT. APPLICATIONS. 10729. 12th June, 1900. Walter Hauenstein aud Daniel Clecner. An improved method of producing pictures in relief. (Complete.) 13th June, 1900. Richard Pilkington. An optical toy. 15th June, 1900. William Carter. graph machine. 15th June, 1900. Antonio Sauve. Improved apparatus for the projection and superposition of the images of several diapositives by aid of a single objective applicable for colour photography. (Complete.) 16th June, 1900. Horst Brehm. A new or improved process and apparatus for handling cinematograph and other rolled films. 20th June, 1900. Antonio Sauve. Improved apparatus for viewing the supsrposed images of multiple diapositives with colour screens. (Completce.) 23rd June, 1960. apparatus. 26th June, 1900. William Hockley. Improvements in mechaniem for taking a series of photographs upon a sensitised band of film and for projecting the same. 28th June, 1900. Philippine Wolff. Improvements in the fixing and guiding of pictures in kinetoscopes. (Complete.) 10781. 10896. Cinemato 10923. 10992. 11213. 11393. John Lockie. Optical illusion 11574. 11745.