The Optical Magic Lantern Journal (April 1900)

56 The Optical Magic Lantern Journal and Photographic Enlarger. 2285. 5th February, 1900. Eugtne Louis Doyen. Improvements in apparatus for taking and exhibiting or viewing what are known as animated pivtures and other pictures or representations. 9th February, 1909. William Shaw. An optical instrume it and picture slides, or the like for showing moving pictures. 2634. 3402. 2let February, 1900. Auguste Daiiliet. Improved means for the projection of cinematographic films upon a _ transparent screen. 3552. 23rd February, 1900. John Marshall Spink. An improved appliance for telescopically delineating distant objects in camera. 23rd February, 1900.. Cecil Wray. iImprovements in or connected with coin-freed apparatus for exhibiting series of photographs. 2nd March, 1900. Frederick Alfred Wallis. Improvements in portable screen frame apparatus for lantern views and similar purposes. 3037. 4011. Copies of the following specifications may be obtained by remitting 1/— for each specification to W. P. Thompson é& Co., Patent Agents, 322, High Holborn, London, W.C. SPECIFICATIONS PUBLISHED, 4978 of 1899. Anderson and ‘X’"' Chair Patents Company, Limited. Collapsible dark-rooms for photographic purposes. 5304 of 1899. Hanriau. Prepiration of photographic sensitised surfaces. 10544 of 1899. Appleby & Thomas. Mechanical slides for purposes of recrestion. 25486 of 1899. Mason. Moving picture methods and devices. 9199 of 1899. Swaab&de Lamprecht, Flash lamp for use with apparatus for exhibiting views and other purposes. 3266 of 1899. Palmer. Apparatus for the production of animated pictures. 3274 of 1899. Spooner (Hanau & Gauthier). and stereoscopic apparatus. exhibiting Coin-freed —_——:0:———_ Io S_9GE Sr SGRSe GES GEGRGHGN GHGS Me Gorrespondence. 3 SGHSGNGN SY GN GN SEGUSNSHNSHNSHSNGN GF Re THE INJECTOR MIXED JET. To Mr, J. Hay Taylor, Editor. Dear Sir,—With reference to the question about Injector jets in last Journal's Notes and Queries column, “Leeds”. will find it necessary when using both gases under pressure to use a regulator set to deliver at about 15 lbs. pressure on the oxygen cylinder, and one at ordinary pres‘ure on the coal gas cylinder, that is if he wishes to get best results. I have used a pair of these Injector jets for past three seasons. Properly used the light given is excellent. If ‘‘Leeds”’ will communicate with me, I shall be pleased to give him any further information I can. Yours truly, W. J. BUTLER. Dudley Road, Halesowen, Birminzham. : | Meant a@ lantern of the Sciopticon type. \ lens. WEE scexcon ne _, Bates and Queries. ‘i CARD J. H. (Exeter).—Relative to your query which we inserted in las: Journal, we are ioformed that the lantern slides bgaring the mark of a large C with a small c inside are introduced by Messrs. Watson & Son, of 313, High Holborn, W.C Amateur.—(1) It is not the shape of the condenser, but its focus which determines its suitability with any particular lens. There seems no reason why the condenser you speak of should not answer with the short focus (2) From an ordinary blow-through jet using “ town gas from the main’’ you should obtain from 200 to 250 candle-power. J. Payne writes to say that in accordance with the suggestion which appeared in this column, he disposed of : his old gas-bag at Stevens’ auction rooms, Covent Garden, : and that it was knocked down for 3s. 64. WW. C. J—The probability is that your six-way dissolver leaks round the plug. Remove this, and grind it in with a little very fine emery. Owen J. Crush.—Messrs. Mawson & Swan will send on application their small pamphlet on transparency | making. Jas. Sowerby asks the quickest method of making a i live or chemical tank for the lantern stage? Ans.—Place a strip of rubber, bent, of course, to the proper shape between two glasse3, and ciamp them together with small screw clamps . Edgar Scott writes :—I have been recommended t) write to you for certain lantern information. At present I am not a lantern user, but intend to join their ranks. I thought of having a lant-rn, using oil for a light; anda friend of mine tells me I cannot do better than get a Sciopticon lantern. Kindly tell me what you think of it, and also give me the name of the maker. Ans.—A lantern of the name you state was brought out in America many years ago, and also had a good sale in this country, but we think that all those whos were connected with it are dead long ago. Probably your friend All oil lamps ' for lantern projection are copies more o: les3 of this : form, and can be procured from any dealer in lantern | apparatus. Lantern Slide.—You cannot use the Art historical slides of Liesegang in the ordinary to and fro carrier. You will require a push-through carrier, as these slide; are longer one way than the English slides. W.C. & Son.—l. Tracing cloth makes a good small screen for use with the Aphengescope. 2. With regard to the lenses, it is simply a matter of quality. Lenses giving a perfectly flat field are naturally more expensive. J. T. Spittlehouse.—We do not know which slide Union you wish to join, please rend us some further particulars. You will be able to get many of the slides you require from the collection of Mr. Harrison, whose advertisement you will find in this issue. If you desire war dioramic effects put yourself in communication with Mr. E. H. Wilkie. C. J. Bellamy writes: Is there an agency for the ‘Cubiqua Acetylene” lamp in England? Ans.—We have seen them in several dealers’ chop; in London. : Amongst others thatof Mr. Tyler, of Waterloo-road, S. W. Will Mr. A. Rateau, late of 17, Holborn, please communicate with us; a lett2r respecting an order for one of his Rautograph machines has been forwarded to us.