256 FINAL ACT OF SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 



Cement Production in the United States. 



E. C. ECKEL, Consulting Engineer, Washington, D. C. 



Geological Sketch of the Department of Cundinamarca. 

 R. LLERAS CODAZZI, Bogota, Colombia. 



General Geology of El Salvador and its Relations to Mining. 

 Luis FLEURY, San Salvador, Salvador. 



Subsection 4 (Applied Chemistry). 



OAK ROOM, RALEIGH HOTEL. 



C. E. MUNROE, Chairman. 



H. B. McDoNNELL, Honorary Chairman. 



Rubber. 



PERCY H. WALKER, Bureau of Standards, Washington, D. C. 



Chemical Research as a Directing Aid in the Efficient Utilization of Pine 



Forests. (Illustrated.) 



C. H. HERTY, President American Chemical Society, Chapel 

 Hill, N. C. 



Subsection 1 (Mining) and Section III (Conservation). 



ROOM A, RALEIGH HOTEL. 



VAN. H. MANNING, Chairman. 



Mining Costs and Selling Prices of Coal in the United States and Europe 



with Special Reference to Export Trade. 



GEORGE S. RICE, Chief Mining Engineer, United States Bureau 

 of Mines, Pittsburgh, Pa. 



The Copper Mining Industry in the Americas. 



WALTER HARVEY WEED, Geologist and Mining Engineer, New 

 York, N. Y. 



Mining, Metallurgy, and Economic Geology of Salvador. 

 Luis FLEURY, San Salvador, El Salvador. 



The Conservation of Copper. 



W. H. EMMONS, State Geologist of Minnesota, University of Minne- 

 sota. 



