The Optical Magic Lantern Journal (August 1898)

The Optical Magic Lantern Journal and Photographic Enlarger. xi. CRETON LIME CYLINDERS. SSS? If you want the very Best and Hardest Limes—Limes which willstand a long time without pitting—Send for Prices and Particulars tothe Manufacturer of the Creton Limes, H. NOYCE, 85, Nunhead Lane, PECKHAM RYE, S.E. SANDS, HUNTER & Co., Photographic Apparatus and Lanterns, NEW AND SECOND HAND, BY ALL THE BEST MAKERS. Lanterns and Operator let out for evening entertainments for children, &c. Terms Moderate. 20, Oranbourne St., Leicester Square, London, W.C. Dissolving View Magic Lanterns and Slides Photographic Apparatus, Scientific Instruments and every description of miscellaneous property. R. J. C. STEVENS begs to announce that he holds Sales of the above, every Friday, at half-past twelve precisely, at his great Rooms, 88, King Street, Covent Garden, London. Gentlemen wishing to include property in these Sales are requested to send particulars one week prior to sale. SPECIAL. Optical Lanterns, with 4 inch Compound Condensers and Three-Wick Lamps, 22/-; with Four-Wick Lamps, 24/-. Handpainted Slides from 4d.; Splendidly coloured 3} by 3} Slides in sets of 12, price 2/6 per set; or four sets for 9/6. Full-sized Changing Comic Slipping Slides, in mahogany frames, Td. each or 6/6 per dozen. Lever Action Slides from 1/6 each, Rackwork Slides (including chromatropes), 2,6 each, Best quality double motion Interchangeable Chromatropes, 4°3; extra Discs from 6d. per pair.‘ Lightning” double-carrier Frames, from 1/each. Slides for small Lanterns from 5d. per dozen. New Catalogue gratis and post free. ROBERT H. CLARK, Wibolesale Optician, ROYSTON, HERTS. DARLINGTON’S HANDBOOKS. “Sir Henry Ponsonby is commanded by the Queen to thank Mr. Darlington fur a copy of his handbook.” “Nothing better could be wished for."— British Weekly. “Far superior to ordinary guides."—Lordon Daily Chronicle. ts.each. Ill'd. Maps by JOHN BARTHOLOMEW, F.R.G.S. The Isle of Wight. The Channel Islands. The Yale of Liangollen.| The North Wales Coast. The Wye Valley. The Severn Yalley. Brighton, Eastbourne, Hastings, and St. Leonards. ournemouth and the New Forest. Bristol, Bath, Chepstow, and Weston-super-Mare. Aberystwith, Towyn, Barmouth, and Dolgelly. Malvern, Hereford, Worcester.and Gloucester. Llandrindod Wells, and the Spas of MidWales. 38. 6d. net. 60 Illustrations. 24 Maps and Plans. LONDON AND ENVIRONS. By E. C. Cook, and E. T. COOK, M.A. Llangollen: DARLINGTON & CO. London: SIMPKIN & Co. PHOTOGRAPHS. — Beautiful Photographs of Scenery, Ruins, &c., in Italy, Greece, Turkey, Palestine, and Egypt: also North Wales, 1s., 1s. 6d., and 2s. Complete List Post Free. DARLINGTON & CO., LLANGOLLEN. THE “INJECTOR” MIXED JET. Patents 10,554 and 24,761/93. 6X PRICE SOs. two or three times the light. The working of <he Jet is simpler than that ofan ordinary jet. The turning off or on of the oxygen supply regulates automatically the This is a great convenience in actual use. to be touched again when using town's gas. supply of coal gas. Ka This is the only Mixed Gas Jet which will work at full power with coal gas taken direct from the town supply. and oxygen from a cylinder. In order to effect this the oxygen, on its way to the mixing chamber, is made to pass through the small Injector | in the sketch at a pressure of about 12 Ibs. per square inch. In passing through the Injector it sucks a supply of coal gas from the pipe H, which is connected with the house pipe, and forces it forward through the short pipe T into the mixing chamber M. Here the mixed gases meet the baffle plate B, which has the two-fold effect of silencing the passage of the gases, and ensuring their complete admixture. The mixed gases then pass through holes in the edge of the plate, and so to the burner. The requisite pressure of oxygen is obtained in the ordinary way by a fine tap on the cylinder, or an automatic regulator fitted with a high-pressure spring to deliver at about 15 lbs. pressure. Three seasons’ experience have fully established the superiority of this Jet over all others. THE FULL 1,800 TO 2,000 CANDLE-POWER (so-called) of the ordinary mixed jet when taking its supply of coal gas direct from the town’s pipe, or even froma bag without any pressure atall. If atown's supply is not available, it will work just as well with coal gas from a cylinder, should be purchased which cannot offer these alternatives. As for blow-through jets, we do not know why they should be used at all, when with the same economy and convenience of working, It will yield We cannot see why ordinary mixed jets the Injector Jet will give When the H tap is once adjusted, it does not need Most existing jets can be fitted with an Injector to enable them to take their coal gas supply from the house pipe. The Jet will in certain cases be sent on approval on deposit of purchase price. Further particulars free on application to MANCHESTER OXYGEN (Brin’s Paten:) CoO., LITD., Great Marlborough Strest, Manchester.