1292 THE COLLIERY GUARDIAN. December 20, 1918. Telegrams-" IN DUSTRIAL, SHEFFIELD." Telephone— - - 4778 CENTRAL. Codes— - - - , A.B.C. (5th Edition).. Illlllllllllllllllllllllllllllllli THE llllllllllllllllllllllllllllllllll Worthington Steel and Annealing Co., Adelphi Steel Works, Watery Lane, SHEFFIELD. Best Crucible & Cast Tool Steels for all purposes. Aeronautical Steels. Hollow Drill Steel. Miners’ Drill Steel. Case-Hardening Steel. Nickel and Nickel Chrome Steels. Cold Rolled Strip Steel for Springs, Band-Saws, Tapes, etc. “JOEL-FORS” Patent Miners’ Electric Lamps APPROVED BY H.M. HOME OFFICE. IMPORTANT ANNOUNCEMENT. Colliery Managers are invited to inspect our latest types of Miners’ and Officials* Approved Electric Lamps, also our Patent Independent Unit Charging Stands at MANCHESTER EXHIBITION OF BRITISH SCIENCE PRODUCTS, Manchester School of Technology, December 27, 1918, to Jan. 9, 1919. JOHN MILLS & SONS, NEWCASTLE-ON-TYNE. • m^'n'ewcastle Established 1828. SAVE COAL and INCREASE POWER WE have the testimony of users to confirm the accuracy of this state- ment. If you want proof we will furnish it upon receipt of your request. In fact, we want the opportunity to furnish you with the experience of others : therefore solicit your enquiry. Shall we have it ? ALLEN & SIMMONDS LTD., Piston & PistonIValve Engineers, READING, Eng.