MINING WORKS. 43 



ON SINKING,_EXPLOSIVES, Sec. 



In Medium 8vo, Handsome Cloth. With 18 Figures in the Text, 

 and 19 Folding Plates. 10s. 6d. net. 



SHAFT-SINKING IN DIFFICULT CASES. 



BY J. RIEMER, 

 TRANSLATED BY J. W. BROUGH, A.M.lNST.C.E. 



CONTENTS. Shaft Sinking by Hand. Shaft Sinking by Boring. The 

 Freezing Method. The Sinking Drum Process. BIBLIOGRAPHY. INDEX. 



"The translator deserves the thanks of the raining community for placing this 

 valuable work before them. . . . The work is one which every mining engineer 

 should include in his library." Mining World. 



SECOND EDITION, Revised. In Large Svo, with Numerous Illustrations 

 and Folding Plates. 10s. 6d. 



BLASTING : AND THE USE OF EXPLOSIVES. 



BY OSOAR GUTTMANN, M.lNST.C.E., F.I.C., F.C.S. 



CONTENTS. Historical Sketch. Blasting Materials. Qualities and 

 Handling of Explosives. The Choice of Blasting Materials. Preparation 

 of Blasts. Chamber Mines. Charging of Boreholes. Determination of 

 Charge. Blasting in Boreholes. Firing. Results of Working. Various 

 Blasting Operations. INDEX. 



"Should prove a -vade-mecum to Mining Engineers and all engaged in practical work." 

 Iron and Coal Trades Review. 



In Medium Svo, Cloth. With many Illustrations in the Text. 

 Four Full Page Plates and Four Folding Tables. 6s. net. 



NEW METHODS OF 



TESTING EXPLOSIVES. 



BY 0. E. BICHEL. 



TRANSLATED AND EDITED BY ALEX. LARSEN, M.lNST.C.E, 

 CONTENTS. Introductory. Historical. Testing Stations. Power 

 Gauges. Products of Combustion. Rate of Detonation. Length and 

 Duration of Flame. After- Flame Ratio. Transmission of Explosion. 

 Conclusions. Efficiency. 



"Its pages bristle with suggestions and actual experimental results to an extent 

 seldom found in a volume of five times its size." Arms and Explosives. 



In Crown Svo. Handsome Cloth. Fully Illustrated. 

 A MANUAL ON 



ELECTRICAL SIGNALLING IN MINES. 



BY GERALD J. HOOGHWINKEL, M.lNST.E.E., M.I.MiN.E. 



CONTENTS. SECTION I. Electric Haulage Signals <a) Acoustic Signals. (6) Optical 

 Signals. (c) Acoustic Optical Signals. Current Supply. Batteries. Accumulators. 

 Main Supply. Design and Construction of Signalling Installations. Maintenance of 

 Signalling Installations. SECTION II. Electric Shaft Signals (a) Acoustic Signals. (6) 



Electro-Mechanical Signals. (c) Optical Acoustic Signals. Signals for Winding Minerals. 

 For Winding Men. Signalling from the Cage. Emergency Signals. Bells. Mine 

 Telegraphs. Mine Telephones. SECTION III. Special Applications in Mines. 



CONDON: CHARLES GRIFFIN & CO.. LIMITED. EXETER STREET. STRAND, 



