648 THE COLLIERY GUARDIAN. March 30, 1917. Purchasers’ Guide to Advertiser's’ Specialities—(continued) Lamps (Miners’ Safety). Ackroyd & Best Ld. “Ceag” Miners’ Supply Co. Ld. Davis, John, & Son (Derby) Ld. Naylor, J. H. Pearson’s Elec. Miners’ Lamp Co. Ld. Protector Lamp and Lighting Co. Ld. Teale, W. E., & Co. Ld. Theedam, E. C., Ld. Thomas, E., & Williams Ld. Lessons by Post. C.M.A. Correspondence School. Southern, T. A., and JI. W. Ilalbaum. Thomas, Wm. Locknut Washers. Fastnut Ld. Lubricators. Baldwin, James, & Co. Lancaster & Tonge Ld. Royles Ld. Tangyes Ld. Treasure, J. B., & Co. Trier Bros. Ld. Machinery (Second-Hand). Blakeley (Firth), Sons & Co. Ld Bute Works Supply Co. Ld. Foot, Rowland G., & Co. Gardam, Harry H., & Co. Ld. Goodwin & Co. Longbotham, R. H., & Co. Ld. Marple & Gillott Ld. Pearson, S., & Son Ld. Phillips, Charles D. Pugsley, Joseph. Renton, B. M., & Co. Riddel & Co. Wake, John F. Ward, Thos. W., Ld. Watson, Jas. B., & Sons. Wildsmith, Jonas. Mills (Grinding). Bradley Pulverizer Co. Hardy Patent Pick Co. Ld. “ Jeffrey ” (Hugh Wood and Co. Ld.). Johnson, W., & Sons (Leeds) Ld Phillips, Charles D. Scholefield, Richard. Wootton Bros. Ld. Mining Equipments (Electric). Bruce Peebles & Co. Ld. Mining Machinery. Boving & Co. Ld. Daglish, R., & Co. Ld. Hadfields Ltd. Hardy Patent Pick Co. Ld. Ingersoll-Rand Co. (Inc. U.S.A.) “ Jeffrey ” (Hugh Wood and Co. Ld.). Johnson, W., & Sons (Leeds) Ld Mining Engineering Co. Ld. Pulsometer Engineering Co. Ld. Sullivan Machinery Co. Sutcliffe, Richard. Wild, M. B., & Co. Ld. Wood, John, & Sons Ld. Worsley Mesnes Ironworks Ld. Motor Converters. Bruce Peebles & Co. Ld. Motors (Electric) A.C. and D.C. Bruce Peebles & Co. Ld. Motor Generators. Bruce Peebles & Co. Ld. Nails, Spikes, etc. Frost, Albert, & Co. Russell, John G. Oil Feeders. Wells, A. C., & Co. Oil Fuel. Brotherton & Co. Ld. Oil Separators. Princeps and Co. Packing (Engine). Heyde (John Bennett) & Co. Lancaster & Tonge Ld. Reddaway, F., & Co. Ld. Renton, Holdsworth & Co. Ld. United States Metallic Packing Co. Ld. Willcox, W. II., & Co. Ld. Paint. Hall & Hall. Hill, W. W., Son, & Wallace, Ld Taylor, S. T., & Sons. Paraffin Engines. Beiliss & Morcom Ld. Fairbanks, Morse & Co. Ld. Patent Agents. Consulting Patent Agency (1880) Harris & Mills. Perforated Plates. Barns, W., & Son. Harvey, G. A., & Co. (Lond.) Ld Hudson, T., Ld. Staniar, John, & Co. Teale, W. E., & Co. Ld. Theedam, E. C., Ld. Picks and Shovels. Fell, C. A. Frost, Albert, & Co. Hadfields Ltd. Hardy Patent Pick Co. Ld. Sullivan Machinery Co. Theedam, E. C., Ld. Pipes (Steam and Water). Isca Foundry Co. Ld. Lewis, Edwin, & Sons. Russell, John, & Co. Ld. Scottish Tube Co. Ld. Stewarts & Lloyds Ld. Wellington Tube Works Ld. Piston Rings. Standard Piston Ring & Engi- neering Co. Ld. Pistons. Daglish, R., & Co. Ld. Lancaster & Tonge Ld. Pit Props (Steel). Henderson & Glass. Lewis, Edwin, & Sons. Marple & Gillott Ld. Scottish Tube Co. Ld. Scott, Walter, Ld. Shelton Iron, Steel and Coal Co. Ld. Ward, Thos. W., Ld. Pit Props (Wood). Baird, J. W., & Co. Osbeck & Co. Ld. Turner, E. W., & Co. Ld. Pit Prop Withdrawers. Hadfields Ltd. Hardy Patent Pick Co. Ld. Points and Crossings. Du Croo & Brauns Goodwin & Co. Hadfields Ltd. Isca Foundry Co. Ld. Marple & Gillott Ld. Renton, B. M., & Co. Summerson, Thos., & Sons Ld. Ward, Thos. W., Ld. Pulleys. Bever, Dorling & Co. Ld. Bridge, David, & Co. Ld. Daglish, R., & Co. Ld. Hadfields Ltd. Spencer & Co. Ld. Pumps and Pumping Machinery. Beiliss & Morcom Ld. Bever, Dorling & Co. Ld. Bumsted & Chandler Ld. Boving & Co. Ld. Clarke, Chapman & Co. Ld. Daglish, R., & Co. Ld. Evans, Joseph, & Sons (Wolver- hampton) Ld. Fairbanks, Morse & Co. Ld. Hathorn, Davey & Co. Ld. Pearn, Frank, & Co. Ld. Phillips, Charles D. Power Plant Co. Ld. Pratchitt Brothers. Pulsometer Engineering Co. Ld. Tangyes Ld. Willcox, W. IL, & Co. Ld. Wood, John, & Sons Ld. Worsley Mesnes Ironworks Pumps (Turbine). Boving & Co. Ld. Pulsometer Engineering Co. Ld. Rails (Iron and Steel). Armytage & Jones Ld. Bute Works Supply Co. Ld. Goodwin & Co. Hadfields Ltd. Marple & Gillott Ld. Renton, B. M., & Co. Scott, Walter, Ld. Shelton Iron, Steel and Coal Co. Ld. Summerson, Thos., & Sons Ld. Ward, Thos. W., Ld. Railway Carriages and Wagons. Birmingham Railway Carriage & Wagon Co. Ld. Bristol & South Wales Railway Wagon Co. Cambrian Wagon Co. Ld. Ghorley Railway Wagon Co. Ld Du Croo & Brauns Riy. Carriages & Wagons (cont.) Lancashire & Yorkshire Wagon Co. Ld. Lincoln Wagon and Engine Co. Ld. Locker’s Wagon Co. Ld. Marple & Gillott Ld. Moy, Thomas, Ld. North Central Wagon Co. Ld. Rigley, William. Rolling Stock Company. Wigan Wagon Co. Ld. Railway Wagon Repairers. Birmingham Railway Carriage & Wagon Co. Ld. Bute Works Supply Co. Ld. Ghorley Railway Wagon Co. Ld Lancashire & Yorkshire Wagon Co. Ld. Lincoln Wagon and Engine Co. Ld. Locker’s Wagon Co. Ld. Moy, Thomas, Ld. North Central Wagon Co. Ld. Rigley, William. Reinforced Concrete. Midland Counties Reinforced Concrete Co. Trussed Concrete Steel Co. Ld. Rescue Apparatus. Mining Engineering Co. Ld. Siebe, Gorman & Co. Ld. Respirators. Mining Engineering Co. Ld. Siebe, Gorman & Co. Ld. Rock Drills. Aqueous Works and Diamond Rock Boring Co. Ld. Diamond Coal Cutter Co. Hardy Patent Pick Co. Ld. Ingersoll-Rand Co. (Inc. U.S.A.) Mining Engineering Co. Ld. Sullivan Machinery Co. Rolling Mills (Electrical Equip- ment of). Bruce Peebles & Co. Ld. Ld. Roofs and Outdoor Buildings. Speirs Ld. Tribe & Astin. Trussed Concrete Steel Co. Ld. Wootton Bros. Ld. Ropes (Cotton Driving). Haggie, R. Hood, & Son Ld. Kenyon, William, & Sons Ld. Ropes (Driving). Haggie, R. Hood, & Son Ld. Kenyon, William, & Sons Ld. Ropes (Wire). Brown, W. B., & Co. (Bank- hall) Ld. Cooke, Wm., & Co. Ld. Cradock, George, & Co. Ld. Elliot, George, & Co. Ld. Glover, Wm. Jas., & Co. Haggie Brothers Ld. Haggie, R. Hood, & Son Ld. Latch & Batchelor Ld. Thompson & Co. Ropeways (Aerial). British Ropeway Engineering Co. Ld. Cradock, George, & Co. Ld. Haggie, R. Hood, & Son Ld. Johnson & Phillips Ld. Safety Belts. Hanley, A. Scrap (All Kinds of). Charkham, J. Scaling Tools. Gilman, Frank. Shaft Sinkers. Francois, Albert. “Trefor” Boring & Sinking Co. Shovels (Sprinkling). Fell, C. A. Signalling Apparatus (Visual). Davis, John, & Son (Derby) Ld. Neil, J. & J., & Co. Sutcliffe, Richard. Theedam, E. C., Ld. Wood, John, & Sons Ld. Spanners. Fastnut Ld. Steam Fittings. Baldwin, James, & Co. Blakeborough, J., & Sons. Hopkinson, J., & Co. Ld. Royles Ld. Russell, John, & Co. Ld. Scottish Tube Co. Ld. Stewarts & Lloyds Ld. Steam Traps. Auld, David, & Sons Ld. Baldwin, James, & Co. Hopkinson, J., & Co. Ld. Lancaster & Tonge Ld. Princeps and Co. Royles Ld. Stewarts & Lloyds Ld. United States Metallic Packing Co. Ld. Wright’s Forge & Engineering Co. Ld. Steam Wagons. Mann’s Steam Cart and Wagon Co. Ld. Steel. Cooke, Wm., & Co. Ld. Cradock, George, & Co. Ld. Haden & Co. Hadfields Ltd. Hardy Patent Pick Co. Ld. Hodgson, E. W., & Co. Howell & Co. Ld. Latch & Batchelor Ld. Mining Engineering Co. Ld. Shelton Iron, Steel and Coal Co. Ld. Stead, J., & Co. Ld. Stewarts & Lloyds Ld. Thompson & Co. Stencil Plates, Steel Stamps, etc. Lawson, John, & Sons. Pryor, Edward, & Son. Stockbrokers. Chapman, Wm., & Co. Stokers (Machine). Bennis, Ed., & Co. Ld. Stone Dust Grinding Plant. Bradley Pulverizer Co. Fletcher, George, & Co. Ld. “ Jeffrey ” (Hugh Wood and Co. Ld.). Johnson, W., & Sons (Leeds) Ld Patent Lightning Crusher Co. Ld. Scholefield, Richard. Structural Steel Work. Goodall, Clayton