AUTHORITIES CONSULTED. XV 



Proceedings: American Institute Mining Engineers. 

 " American Society of Civil Engineers. 



" Institute of Mechanical Engineers. 



" Institution of Civil Engineers. 



Reports: British Alkali Commission. 



" British Association of Gas Managers. 



" Bureau of Mines, Canada. 



" Department of Mines, New South Wales. 



" Geological Survey, Ohio. 



" Geological Survey, U. S. 



South Lancashire and Cheshire Coal Association on Boilers 



and Smoke Prevention, 1869. 

 Revista Minera. 

 Revue Scientifique et Industrielle. 



" Universelle des Mines. 

 Sanitary Engineer. 

 Scheerer, Lehrbuch der Metallurgie. 

 Scheurer-Kestner, Pouvoir Calorifique des Combustibles. 

 Science. 



Ser, Traite de Physique Industrielle. 

 Stahl und Eisen. 

 Stevens Indicator. 

 Thomsen, Thermo-chemie. 

 Transactions Newcastle Chemical Society. 

 Ure's Dictionary. 



United States Census Bulletin, 1890. 

 Williams, C. W., Fuel, its Character and Economy. 

 Watt's Dictionary of Chemistry. 



Witz, Traite theorique et pratique des moteurs a gaz. 

 Wurtz, Dictionnaire de Chimie. 

 Zeitschrift Physikalische Chemie. 



" des Vereines Deutscher Ingenieure. 

 Zeitung Berg- und Huttenwesen. 



