May 3; 1918. THE COLLIERY GUARDIAN. [supplement page VII.] 917 Wrought SPECIAL JOINT. These Tubes are specially suitable for mines, being both light and strong. The Joint, as illustrated, can be easily connected, and a tube can be removed without disturbing the run Fittings of all kinds supplied. Iron and Steel Tubes. Improved Albion Loose Flange Joint. PIT PROPS. We manufacture Tubular Steel Pit Props, which are exceptionally strong and durable. They can be used repeatedly and have a high factor of safety. Lists sent on application. STEWARTS and LLOYDS LTD., GLASGOW—41, Oswald Street. BIRMINGHAM—Broad Street Chambers. —Winchester House, Old Broad St., E.C. 2. ALWAYS AT YOUR SERVICE. OF NELSON COLUMN FAME. W. E. HARRISON, Practical Steeplejack, Regent Terrace, SHEFFIELD, for Repairs, Additions and Renewals to Tall Brick & Iron Chimney Stacks, Lighthouses, Church Spires, etc. LIGHTNING CONDUCTORS : A SPECIALITY. : AWARDED 3 GOLD MEDALS FOR EXCELLENCY. A trial in any part of the country solicited. ORMEROD’S IMPROVED PATENT SAFETY LINKS For the effectual prevention of Accidents from Over- winding. THE BEST AND MOST RELIABLE SAFETY DETACHING HOOK YET INVENTED. Advantages and full particulars on application. Sizes up to 10 Tons working load in Stock or Progress. DIPLOMAS OF HONOUR AWARDED TORONTO, LONDON & OTTAWA, CANADA, August, September and October, 1898. PATENTEE 8? SOLE MANUFACTURER— EDWARD ORMEROD, Atherton, nr. Manchester. AND This Valve BECAUSE IT’S THE BEAT-ALL-RENEWABLE GALLOWAYS Special Metal Valve and Seat Parallel Slide Blow-off, WITH “The First’ Dust ahd Ash Guard. Economy It’s made In the Steam Users' Interest, SEND FOR CATALOGUE, FREE. Est. 1877 Over 2.000 British Steam Users are now using the Baldwin u BETALL” Valves. JAMES BALDWIN & CO., KEIGHLEY, Engineers and Founders. LIMITED, 63^p&. MANCHESTER. PATENT UNIFLOW ENGINE. WRITE FOR PARTICULARS. SMALLMAN patent HAULAGE CLIPS. British Patents No. 8476 of 1906 ; No. 19533 of 1910 ; No. 9983 of 1911 ; and No. 4362 of 1912. Automatic Detachment. 1912 Pattern ; nine sizes. A and B Couplings and many others. The 1912 lever has large lateral stops and a wedge-shaped shouldered head. The catch C is not essential. Drop-Forged Shells. Drop-Forged Catches. Drop-Forged Levers. Drop-Forged Couplings. ILLUSTRATED CATALOGUE. Patentee and Sole Manufacturer SEVER, DORLING & CO. LTD Bowling Iron Works, BRADFORD. Telegrams—“TOUNDBY, BBADFOBD." Telephone—16U BBADFOBD. AGENTS Northumberland and Durham—Mr, W. E. COWENS, Scottish Union Bldgs., 90, Pilgrim St., NEWCASTLE-ON-TYNE, South Yorkshire, Derbyshire and Nottinghamshire- South Wales—Mr. D. LLEWELLIN EVANS, 120 Bute Street, CARDIFF. Manager Fan Department—R. A. YOUNG, 13, Mosley Street, NEWCASTLE-ON-TYNE. SOLE LICENCEES FOR CAPELL FANS. PRE-EMINENT FOR 25 years for efficiency, strength and reliability. New and improved design, giving larger outputs for same size of fan. RESULT OF TEST. Fan, 12 ft. 6 in. by 7 ft. Revs., 265. W.G., 8 in. Cu. ft. per min., 376,000. H.P. in air, 472. H.P. indicated, 579. Useful effect, 81’5 per cent. Estimates for Fans up to the largest capacities.