774 THE COLLIERY GUARDIAN October 20, 1916. THE “COLLIERY GUARDIAN” PURCHASERS' GUIDE TO ADVERTISERS’ SPECIALITIES. Further information can be obtained on reference to the Weekly Alphabetical Index to Advertisers. Accumulators Pearson’s Electric Miners’ Lamp Co. Ld., Victoria Works, Stratford, E. ACETYLENE Lamps—Lampes a gaz Acetylene Davis, John, and Son (Derby) Ld., Derby Theedam, E. C., Ld., Dudley. ACID Plant—Installations pour la fabrications des acides Daglish, Robert, and Co. Ld., St. Helens, Lancs. Air Analysis Apparatus—Appareiis d Vanaiyse de Vair Siebe, Gorman and Co. Ld., Westminster, S.E. Air Compressors comprimewrs d’air Beiliss and Morcom Ld., Birmingham. Bever, Dorling and Co. Ld., Bradford, Yorks Daglish, Robert, and Co,, St. Helens, Lancashire Hardy Patent Pick Co. Ld., Sheffield Harvey, G. A., A Co. (Ldn.) Ld., Woolwich-rd., S.E. Mining Engineering Co. Ld., Sheffield Plowright Bros. Ld., Chesterfield Pulsometer Engineering Co. Ld., Beading Beavell and Co. Ld., F. Department, Ipswich Sullivan Machinery Co., 314, Salisbury House, E.C. United States Metallic Packing Co. Ld., Bradford Walker Brothers (Wigan) Ld., Wigan Wood, John, & Sons Ld., Brook Foundry, Wigan Worsley Mesnes Ironworks Ld., Wigan Air Pipes—Tui/aua?