The Optical Magic Lantern Journal (November 1896)

196 Previous to my invention, only a flickering light had been produced, and that with a dangerous device. I also take exception to the judgment passed upon the ‘‘ barrel” saturator. It is true enough that imperfect imitations of my models, used in ways which I always expressly condemned, have not always given satisfaction, but that is neither the fault of the inventor, nor of myself. All of the alleged improvements upon my method of producing the ether limelight, appear to consist of means of one kind or another for securing the better vaporisation of the ether by warming it; but this was not successfully accomplished until years after I had obtained the same result by substituting light petroleum ether for sulphuric ether. This part of the matter may be summed up a8 follows :— In England, where purified petroleum ether is scarce, and methylated sulphuric ether is cheap, '‘ warm” saturators with methylated ether may be preferred; but in America, where purified petroleum ether is the more plentiful and the cheaper, it was extensively and quite as successfully used in ‘‘cold"’ saturators years before. Each in its place, one method is as good as the other, and both alike are subject to the original patents granted to me in America. But I do like the idea of stowing the saturator away in the lantern, instead of carrying it as a separate Piece of apparatus. Very trulv vours, F. E.IVES. Shaftesbury Avenue, London, W.C. CYLINDERS PER PASSENGER TRAIN. To the Editor. Srr,—Seeing that the majority of railway companies will now allow eylinders to be carried by passenger train, cannot something be done to again get them carried as passengers’ luggage. At present the carriage for cylinders | makes it practically impossible for one to take them for & great distance, hence they must be sent by goods in the hope that they will arrive in time. If amateurs and professionals could uniteina petition tothe railway companies and Board of Trade, I think it quite possible that our point may be gained. I shall be pleased to hear frum correspondents on this subject. JAS. W. GARBUTT (Lanternist to Gilchrist Lecturers.) Armley, Leeds. ——:0:—_— MWe 9 XIANUDY roy Beétes and Queries. CARD? J. K. Mackay.—(1) When using Wood's shield, it can be removed when changing the lime. (2) It does not tend to crack the condenser. (3) The opening is sufficiently large to allow of its being seen for adjustment urposes. (4) Rack work is the best if the fitting be careully done, but if carelessly effected there is chance of a slip between the tevth. in which case the whole thing becomes a nuisance. (5) The curtain to which you allude is a good one. A. Pexton.—We do not see how you can improve upon your present acreen, so long as it is necessary for you to The Optical Magic Lantern Journal and Photographic Enlarger. show through it. The wetting can be best effected by means of a syringe with a rose top. After the screen is in position, an applicacion now and again will keep it in good order. When using the cinematograph from the front, you canoot do better than get one of Field's faced screens (see his advertisement). This will give nearly double the brilliancy of any other ecreen on the market. W.A.—If you intend using a larger disc you will obtain less illumination, but if the same size under the conditions you mention, the i]lumination will be practically the same as before, although the lantern will be further from the screen. Lime,—Will the correspondent who sent us a letter signed ‘‘ Lime," partly written with a typewriter, kindly send us his name and address in confidence, as we make. it a rule not to insert letters unlecs this is done. AS soon as we get this we shall have pleasure in inserting the letter, which speaks in high terms of the Lantern Society and the excellent work of its officers. Butcher d: Son.—The washer duly received; it answers. admirably. S. Kendon.—Tlumination 1, saturator 2, blow-through 3; acetylene—safety 3, 1, 2, simplicity 3, 1,2. The disc you suggest is rather large for acetylene. [Re saturator— We have no particular choice. Re acetylene— Hither: Thorn & Hoddle, or the Acetylene Gas Company. G. Bennett.—(1) If your wish had been carried out the parcel would have been liable for letterpost. (2) Acetylene will give a more brilliant disc than the oil lamp to which you allude, but the oil and the silvered screen would probably be ample for your purpose. (3) The wicks have a tip of asbestos, but we do not in the long run find them such a great advantage as you sta'e. Jex Bardwell.—We have incorporated a few of your remarks, but surely there must be some error about the material of the bellows of the English regulator, as the makers always use thick rubber and not leather. T. C. Sheaf.—The “injector” with ordinary regulator. The ‘‘ejector'’ is practically a blow-through with the tubing carried a Jittle further than usual beyond the oxygen nipple. Two Correspondents.—You must keep a note of the questions youreelf, and when we reply as 1, 2 or 3, we cannot look up old letters to send you your questions. F. i). Fearnside.—-Use separate gauges for oxygen and hydrogen unless you procure Clarkeon's filled gauge, which can be used for both, as it is so constructed that the gas does not enter. J. W. Wigmore.—Kindly note, for future information, that letters for the business and editorial departmenta should be written on separate paper. The cost would be about £75, and the weighta little undertwotons. If you turn to our issue of April, 1894, page 83, you will find full particulars. T. 1. Wing.—Received just as we were going to press. In our next. STILL THEY COME. Mr. F. W. HUDLASS, of SOUTHPORT, when renewing his advertisement in the ‘Optical Magie Lantern: Journal’ writes, Oct. 17th, 1896.—"I am quite satisfied with my advertisement last month, I have had enquiries from all over England, Scotland, Ireland, France, Germany, &c.”’