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HUbrniiiS' SiMPIiEX CERTAIN ACTION PATENT OXYGEN GENERATOR. The defects hitherto found in many Oxygen Generators are now remedied. No complicated parta. Automatic release. Action positive. Separate retorts done away with. Filled in a few minutes, and, if re- quired, a fresh generating retort can be replaced while it is working. Note. —The lamp is detachable from the chain, an important feature of this invention. Should the automatic chain that carries the lamp by any means go wrong (which is not at all likely), with this arrangement the lamp can be moved higher up the tube by hand, where a fresh part can be exposed to its heat, and so go on generating the gas. No failure Can arise. Price Complete - £6. FURTHER IMPROVEUEMTS. ACTION POSITIVE. The only perfect Oxygen Gas Generator extant. This used with one of Mr. Hughes' Safety Ether Saturators will, with properly constructed jet, give a very powerful light under full pressure. New Auto=Qenerator of Oxygen Qas, produced by OXYLITH. No Heating. Quick to Produce. Very suitable for Tropical Climates. This new model offers great advantage to produce oxygen. Oxylith is made only in France and cannot be substituted for any other chemical. The manipulation is exactly the same as in the Acetylene Generator. By putting the Oxylith in contact with the water the Oxygen is produced immediately. The generator is constructed purposely on cientific principles. The apparatus is rigid, and maintains a cool temperature. The pressure and the capacity are sufficient to vork any limelight jet for at least 2 hours. The apparatus is very simple to work, and 'ives perfect results. It is exceedingly portable, and a useful appliance for working vith an Ether Saturator, and a Chamber let at full pressure, or ordinary house gas with a Blow-through Safety Jet. PRICE £4 10s. W. C. HUGHES, Specialist in Optical Projection, BBEWSTEB HOUSE, 82, MOETIMEK £OAD, EINGSLANS N.