522 THE COLLIERY GUARDIAN. March 7, 1913. “Bowie” Underground Lamp Re-Lighter. Patented in Great Britain, Germany, France, Belgium, U.S. America, in 1907-8, and since used with success and without accident in the most dangerous Mines in these Countries. Adopted by the French Government for use in French Mines. MAGGIE BROS. Ltd Gateshead-on-Tyne. Established 1800. MANUFACTURERS OF IMPROVED PATENI Air-tight, Non-Inflammable, Gas-proof, Insulated & Non-external Sparking. Electric Contacts are fixed and there are no switches or secondary cur- rent to contend with. No cells or accumulators to replace. The Lamp is totally enclosed in gas- proof chamber when being re-lighted, and can only be operated by authorised persons. It can be used with absolute safety for igniting Lamps in the most gaseous atmosphere. Adapted to ignite any form of Safety Lamps. Impossible to generate an electric current from the apparatus until the Lamp-containing receptacle has been made perfectly air-tight. Always ready for use and its upkeep is practically nil. Flat and Round Wire and Hemp ROPES OF ANY LENGTH FOR COLLIERIES AND RAILWAYS, FROM EITHER BEST SELECTED CHARCOAL IRON, IMPROVED PATENT OR PLOUGH STEEL WIRE. Flexible Galvanized Steel Hawsers (all guaranteed ta Lloyd’s test), with Winches or Reels and Stoppers. Wire Signal Lines for Railways and Collieries, Copper Lightning Conductors, complete. Galvanized Fencing Strand. Galvanized Wire Rope for Ships’ Rigging. Galvanized Wire Rope fitted up to order. Picture and Sash Cord made from Copper, Brass Plated or Galvanized Wire. Crane Ropes, made to suit small Drums and Pulleys. We have Crane Ropes working on the same Barrels as Chains. Wire Rope Springs; Wire Rope Pulleys. Wire Rope Composition or Grease. White Block Ropes and general Hemp Cordage. Chains of every description. Wire Ropes made specially to suit small Pulleys. We can guarantee uniformity of all our Ropes, as we draw our own Wire from Special Rods, got up to our own specification. Owing to our “Special Quality,99 have Haulage Ropes running 14 years and Winding Ropes years Telegrams—” Haggle, Gateshead The Colliery Ready Reckoner and Wages CALCULATOR. By JAMES IRELAND. " Will be the means of preventing many disputes between pay clerks and colliers.”—Mining feumal. Colliery Guardian Office, 30 & 31, Furnival-street, Holborn, London, E.C. Cloth limp, price Is. 6d.; post free, Is. 7 d. Further particulars may be obtained on application to— E. THOMAS & WILLIAMS L" 1 ABSTRACT of the REPORT of the PRUSSIAN COMMISSION —ON— FALLS OF STONE AND COAL. Price - - - One Shilling. THE COLLIERY GUARDIAN COMPANY LTD., 30 & 31, Furnival Street, Holborn, London, E.C. COLLIERY PROPRIETORS & MANAGERS contemplating EXTENSION of SURFACE PLANT, INSTALLATION of SCREENS, or ERECTION of HEADGEAR, should engage services of disinterested EXPERTS who see that BUYERS OBTAIN BEST EQUIPMENT AT LOWEST COST, consistent with dura- bility. Preliminary drawings and approxi- mate costs prepared. C. & A. STEELE, 341, High Street, West Bromwich. The Gwalia Forge Co., Caergwrle, Wrexham, N. Wales. Walter Scott Ltd. Leeds, LEEDS STEEL WORKS. England. ESTABLISHED OVER 250 YEARS. Absolutely the best tubs on t|he (market) to their^weight than any[other make. :: :: First=class :: references given if desired, one colliery alone having purchased over 2,000 tubs from us. :: :: Caergwrle Steel Pit Wagons. WE SPECIALISE IN Colliery Tubs, Draw=Bars, Wagon Couplings, Angle Work, Colliers’ Rakes & Baskets, Spades, Shovels and Picks to any Pattern. Also all kinds of Smith Work and Steel Forgings of every description. Prices on application. Price 3s. 6d. post free. A Practical Handbook for Colliery Electricians. ELECTRIC CIRCUIT PROBLEMS in Mines and Factories. — BY — ELLIS H. CRAPPER, B.Eng., M.I.E.E., Head of the Department of Electrical Engineering at the University of SheMeld. THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C. MANUFACTURERS OF BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS, TRAMRAILS AND PERMANENT WAY RAILS, Ac. Pit Head Frame, k Erected in Works for inspection. Example of 10 in. x 6 in. -- 421b. B.S Joists curved for Framework to Roadway. ROLLED STEEL JOISTS for PIT PROPS, FRAMEWORK TO ROADWAYS, &c. STRUCTURAL STEELWORK FOR BUILDINGS, &c. Mild Steel Blooms, Billets, Slabs, Tinbars. Rounds & Flats. Rolls cut for Special Sections and to approved quantities. Books of Sections and other information on application.