158 THE COLLIERY GUARDIAN. January 16, 1914. the casing above it, so that when the upper valve is reopened there is no relative displacement between the casing and trap and the velocity of the ascending streams of the washing elements is in no way altered. The accompanying drawing illustrates in sectional elevation part of the launder or trough of a mineral washer of the kind referred to, and one set of washing elements provided with a collecting chamber and a trap adapted according to the invention. When the collecting chamber e is practically full of schist, which can be ascertained by the insertion of a poker through the central slot c, the sluice valve g is opened so that the schist is discharged from the chamber e into the trap/. When this occurs water equal in volume to the volume of the schist will be displaced by the schist and will enter the collecting chamber e. The valve g is then closed and the valve h opened, so that the schist can be finally dis charged from the apparatus. The water in the trap/ will be discharged with the schist, but as the valves g and n are both closed during this discharge operation, only a volume of water equal to the difference in volume of the schist and the trap f will be allowed to escape, so that the consumption of water will be reduced to a minimum. After the discharge of the schist from the trap /, the valve h is closed and the trap is refilled with water by opening the stop cock n in order that there will be no undue disturbance of the water in the washing elements when the valve g is again opened. The valves g and h are large enough to discharge schist of the maximum size for which the washing apparatus is designed. The invention therefore enables comparatively large discharge orifices to be used while reducing escape of water to a minimum. The operation of the valves g, h and « may be effected by hand or automatically. (Two claims.) HEW PATEHTS CONNECTED WITH THE COAL AHO IRON TRADES. Applications for Patents, 226. Electric furnaces. I. Rennerfelt. 228. Process for agglomerating coal and other pulverulent or plastic materials. H. Steven. 231. Suspenders for electric cables and the like. P. Huntington. 241. Apparatus for bending tubes. J. Ruckstinat. 250. Estimation of substances in gases. J. Harger. 262. Pit props. V. A. Verner. 264. Extraction of tar from coke-oven retort gases and the like. P. Schwarz. 272. Grinding mill for hard materials. H. Aldehoff. 294. Breathing apparatus. C. Travers. 301. Hoisting appliance. J. T. Pickering and W. J. and C. J. Phillips Limited. 303. Process for the production of producer-gas from bituminous fuels in a gas-producer furnace. Dellwik-Fleischer Wassergas G.m.b.H. 355. Picks. G. Beckmann. 362. Process for the treatment of ores containing iron and copper. S. O. Cowper-Coles. 411. Indicator for recording signals in mines. Garswood Hall Collieries Company Limited, J. H. Edmond- son, and T. Eddleston. 437. Process for the production of motor spirit from heavy hydrocarbons. W. A. Hall 444. Rock drills and the like. J. M. Holman and J. L. Holman. 454 Automatic gates for pit bottoms or landing stages. D. H. Gwilym and J. C. B. Jones. 476. Gas-producers. International Nitrogen and Power Company Limited and 0. D. Lucas. 481. Rotary engines, pumps, and the like. J. Joosten and P. A. Perrin. 488 Roller for supporting haulage or Winding ropes and the like. F. M. Castleman. 510. Hoisting and lowering gear. L. Tabulo. 588. Reciprocating piston devices for impact tools. J. M. Holman and J. L. Holman. 599. Devices for supporting and insulating electric conductors. Neville, Williams and Co., and A. E. Woodhouse. 617. Valve apparatus for percussive rock drills and the like. G. Rayner. 691. Gas-washing apparatus. A. J. Liversedge and W. B. Davidson. 704. Bricks, building blocks, and the like. G. Anderton. 749. Supports for electric trolley wire’. K. von Kando. 768. Axle and the like bearings. 0. H. Bursell. Complete Specifications Accepted. To be published on January 29, 1914. 1913. 366. Means for securing wheels and the like to axles, shafts, and the like. Higgitt. 614. Fluid-pressure or steam-turbine engines. Haddan. (Universal Turbine Company.) 668. Settling tanks or the like. McCormick. 692. Safety devices for steam-condensing plants wherein air is exhausted from the condenser by means of an air ejector of the water-jet type. Muller. 804. Marine turbine installations. Parsons, Cook and Chapman. 878. Detonators. Nobel's Explosives Company, Corrie and Ashcroft. 953. Turbine compressor and like installations. Parsons, Cook and Carnegie. 1430. Method and apparatus for quenching and loading coke. Franz Meguin and Co. and Muller. 1639. Steam boiler furnaces. Buckley and Smith. 1862. Earthing clip. Townson. 3317. Tipplers or means for emptying railway trucks and the like. Provay. 4081. Centrifugal blowers and other centrifugal machines of a similar nature. Homersham and Berk. 5613. Valves for pneumatic hammers, pneumatic hammer drills, percussive drills, direct-acting pumps and engines. Daw and Daw. 7217. Punching and riveting machines. Dolcher. 8139. Couplings for colliery trams or the like. Doughty. 8251. Rotary blowers. Axien. 11913. Continuous weighing apparatus or the like. W. and T. Avery Limited and Parnail. 16807 Controlling gear for or connected with electrically- driven hydraulic pumps. Towler. 17027. Smith’s forges. Schar. 18501. Process and apparatus for supplying air and oxygen to independent deep-diving apparatus. Drager- werk Heinr. und Bernh. Drager. 23561. Devices for connecting flexible cables used for respiratory apparatus and similar purposes. Dragerwerke Heinr. and Bernh. Drager. Complete Specifications open to Public Inspection before Acceptance. 1913. 29962. Railway brakes. Cheney. 29993. Couplings for railway and like vehicles. Boirault. The Pyrene Fire Extinguisher.—We recently witnessed some interesting fire-extinguishing demonstrations on a piece of spare land in the South-east of London which afford testimony of the efficiency of the above extinguisher- The tests—10 in number—were some of the severest that could possibly be designed, consisting of fires caused by petrol, acetylene gas, together with petrol and celluloid film, &c., all of which were successfully extinguished within a few seconds. The construction of the extinguisher is very simple, and takes the form of a double-acting pump, which is easily operated by hand, and is of one quart capacity. It is capable of throwing a jet of the fluid to a distance of about 30 ft., and when charged the extinguisher weighs only some 5 lb. One great advantage in connection with the appliance is that the liquid—Pyrene—with which it is charged is a non-conductor of electricity, therefore per- mitting its use with safety on the highest voltages com- mercially used and on all classes of electrical equipment. The effect of the liquid when subjected to a temperature of 200 degs. Fahr., or over, is that it immediately transforms itself into a heavy, dry, cohering, non-poisonous gas blanket, which envelops the burning material, cutting off the air supply necessary for the life of the fire, thereby extinguishing it. Amongst the other advantages claimed for the extin- guisher is that the fluid is of an absolutely harmless nature, being a combination of purely organic materials. It is further claimed that the liquid does not lose its strength or deteriorate with age. We may add that further particulars regarding this extinguisher may be had upon application to the Pyrene Company, of 29a, Charing Cross- road, London, W.C. GOVERHHENT PUBLICATIONS. Any of the following publications may be obtained on application to this office at the price named post free. Consular and Trade Reports : Netherlands, Surinam, 1910-12, 4d. ; Germany, Dantzig, 1910-12, 6d. ; Argentine, Buenos Ayres, 1912-13, 10,d. Trade and Navigation Returns for December 1912, Is. 9d. Land Value Duties, Rules, 31/7/13 (No. 1275), l|d. Annual Return Form No. 5 for Authorised Society, 2Jd. Foreign Import Duties, 1913, 5s. 7d. Housing and Town Planning : Memorandum No. 3, 2d. Royal Commission on the Natural Resources, Trade and Legislation of Certain Portions of H.M. Dominions. Minutes of Evidence taken in New Zealand in 1913, 2s. 5d, Board of Education Statistics, 1911-12-13, Part II., Is. 9d: Industrial and Provident Societies: Draft Regulations, 31/12/13, lid. PUBLICATIONS RECEIVED. Gas World Yeab-book, 1914. London: John Allan and Co. Price 7s. 6d. Butterworth’s Compensation Cases (Vol. 6). Edited by Judge Ruegg, K.C., and Douglas Knocker, K.C. London Butterworth and Co. Price 7e. 6d. Fourth Annual Report of the Commission of Con- servation, Canada, 1913. Toronto: Warwick Bros, and Rutter Limited. First Aid in Mining (Metalliferous Mines). By Louis G. Irvine. Johannesburg: South African Red Cross Society. “ Revue Universelie des Mines et de la Metallurgie ” (Tome 4, No. 3), December; “Bulletin of the American Institute of Mining Engineers ” (No. 84), December, price 50 cents; “ Journal of the Chemical, Metallurgical and Mining Society of South Africa” (Vol. 14, No. 5), price 3s.; “ Canada Department of Mines, ‘ The Production of Iron and Steel in Canada during 1912’”; “The International Review ’’(Vol. 1, No. 2), January, price 2s. CATALOGUES AND PRICE LISTS RECEIVED. The Chicago Pneumatic Tool Company forward an illustrated bulletin dealing with the Chicago portable mine hoist. Messrs. Fielding and Platt Limited (Gloucester) send a card showing in colours the structural features of the “ Fielding ” gas engine, which is made in capacities of from 10 to 300-B.H.P. Messrs. Mather and Platt Limited (Park Works, Manchester) have prepared an ingenious flat model of the turbine pumps made by them. By means of adjustable scales it is possible to read off with ease the B.H.P. in relation to pump efficiency for any capacity and lift. The British Aluminium Company Limited (109, Queen Victoria-street, E.C.) issue pamphlets dealing with various applications of aluminium. One of these treats of the use of the metal in connection with chemical plant. It is extensively employed for nitrating pans, the grids of centrifugals and other accessories in the manufacture of explosives, as well as for storing and transporting oils, &c. Messrs. Irwin and Jones (London House, New London- street, E.C.), are sole British agents for the “ Geji ” Buffalo belting, a pamphlet relating to which they have sent us. This belting is composed of a number of chrome tanned strips of leather running on edge, the strips being fastened together in parallel rows by means of staggered steel rivets or rods. Tests carried out by the French Government and others show that the “ Geji” belt has a coefficient of friction of over 30 per cent, more than ordinary double leather belts and 42 per cent, higher than cotton belting, and that the leather used is over two and a-half times stronger than the best oak tanned leather, and nearly twice as strong as raw hide leather. Mr. George Goode, Nottingham, coal merchant, who died on September 6 last, left estate of the gross value of .£12,109 Os. 7d., of which £5,721 10s. lOd. is net personalty. Oxygen Reviving Apparatus. The Safest and Most Reliable Means of reviving persons apparently asphyxiated is to administer Oxygen by a simple form of apparatus, as shown, and at the same time use the Schafer method of resuscitation which is known to all St. John Ambu- lance and Eed Cross Students. DARLINGTON’S HANDBOOKS. “Nothing better could be wished for.”—British Weekly. “ Far superior to ordinary guides.”—Daily Chronicle. Visitors to London (and Residents) should use DARLINGTON’S “ Very emphatically tops them all.”—Daily Graphic. **A brmiant book ”— JkJP JL/’W • • particuiariy g00d.Academy. By B. C. COOK and 5th Edition, Revised Sir EDWARD T. COOK. 6/- ENVIRONS. 30 Maps and Plana , ,, 80 Illustrations. ” The best Handbook to London ever issued. —Liverpool Daily Poet. 80 Ilins. Maps k Plans, Ss. NORTH WALES. BO Ilins., 6 Maps, 2s. 6d. N. DEVON k N. CORNWALL. 1OO Ilins. Maps & Plans, fis. DEVON A CORNWALL. SO Ilins., 6 Maps, as. 6d. 8. DEVON k S. CORNWALL ALSO MAKERS OF “Proto” (Fleuss-Davis Patent) Rescue Apparatus. SMOKE HELMETS. RESPIRATORS. OXYGEN INHALING APPARATUS. GAS ANALYSIS APPARATUS. SIEBE, CORMAN & CO. LTD., Telegrams—“ Siebe, Lamb, London.” Neptune” Works, Telephone No.—251 Hop. agent for North America ano Mexico H. N. ELMER 1140, Monadnoch Block, Chicaco. S.E. A Handbook to the Leading Hotels throughout the World. Visitors to Edinburgh, Glasgow, Brighton, Eastbourne, Hastings, St. Leonards, Worthing, Bournemouth, Exeter, Torquay, Paignton, Exmouth, Bidmouth,Teignmouth.Dawlish, Plymouth, Dartmouth, Dartmoor, Exmoor, Falmouth, The Lizard. Penzance, Land’s End, Scilly Isles, St. Ives, New- quay, Tintagel, Clovelly, Ilfracombe, Lynton, Minehead, Bideford, Wye Valley, Severn Valley, Bath, Weston-super-Mare, Malvern, Hereford Worcester, Gloucester, Cheltenham, Llandrindrod, Bala, Brecon, Ross, Tintern. 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