The Optical Magic Lantern Journal (April 1899)

The Optical Magic Lantern Journal and Photographic Enlarger. x1, TRE “My, ASSSSSSY iN =e \ 4 Se ey tn, een gee 4 7 fT Price 1/post free, OR : FROM DEALERS EVERYWHERE. TAYLOR, TAYLOR: Hopson. SANDS, HUNTER & Co. Photographic Apparatus and Lanterns, WEW AND SECOND HAND, BY ALL THE BEST MAKERB. Lanterns and Operator let out for evening entertainments for children, &c. Terms Moderate. 90, Oranbourne St., Leicester Square, London, W.O. scr R L Dissolving View Magic Lanterns and Slides Photographic Apparatus, Scientific Instruments and every description of miscellaneous property. R. J7C, STEVENS begs to announce that he holds Bales of the above, every Friday, at balf-past twelve preoisely, at his great Booms, 88, King Street, Covent Garden, London. Gentlemen wishing to include property im these Sales are requested to send particulars one week priory to sale, ' That indispensable adjunct to a hand-camera, the circular spirit level.’ —Annty. The new design of Circular Spirit Level shown here in section is a great advance on previous designs. With every level we give a practical guarantee of durability. SiaTE SrrReET Works, LEICESTER. AND 18, BERNERS STREET, LONDON, W. CRETON LIMES Are unsurpassed for Brilliancy of Light and Hardness of Lime. The Best and Cheapest on the Market. . ONE TRIAL WILL PROVE THIS FACT. Send for Prices iad Parteners (6 the Manufacturer af the CRETON LIMES, H. NOYCE, 85, Nunhead Lane, PECHHAM RYE. BS.E. Seen ee ene Lantern Slides of Historical Portraits and Events. 15th, 16th, 17th and 18th CENTURIES. SEND FOR LIST TO “ H. de BLOIS-LEACH & CO., Lantern Slide Makers to the Oxford University Extenston Lecturcys 8, THE TURL, HIGH STREET, OXFORD. Slides made from Book Ulustrations, Engravings, etc..on the shortest notice by the Collodion Process at ts. 6d. each. cash with order. “INJECTOR” MIXED JET. Patents 10,554 and 24,761/93 GX PRICE SOs. > 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 lbs. 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 eftect of s.lencing the passage of the gases, and ensuring their complete admixture. The mixed gases then pass through holes in the edge of the plate, and soto 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 Ibs. pressure. Four seasons’ experience has fully established the superiority of this Jet over all others. It will yield THE FULL 1,800 TO 2,000 CANDLE-POWERE (so-called) of the ordinary mixed jet when taking its supply A of coal gas direct from the town's pipe, or even froma bag without any pressureatall. If atown's supply isnot available, it wiil work just as well with coal gas froma cylinder. We cannot see why ordinary mixed jets should be purchased which cannot offer thes: 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, the Injector Jet will give two or three times the light. Ry removing the Injector nipple the jet becomes an ordinary mixed jet. This can be done whenever it is desired to work with oxygen at low pressure, and coal gas from a cylinder. The working of the Jet is simpler than that ofan ordinary jet. When the H tap is once adjusted, it does not need to be touched again when using town’s gas. The turning off or on of the oxygen supply regulates automatically the supply of coal gas. This is a great convenience in actual use. Most existing jets can be fitted with an Injector to enable them to take their coal gas supply from the house pipe. THE The Jet willin certain cases be sent on approval on deposit of purchase price. Further particulars free on application to MANCHESTER OXYGEN (Brin’s Patent) CO., LTD., Great Marlborough Street, Manchester.