FINAL ACT OF SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 255 

 Subsection 4 (Applied Chemistry). 



ROOM B, RALEIGH HOTEL 



C. B. MUNROE, Chairman. 



W. P. MASON, Honorary Chairman. 



The Value of Scientific Research and Laboratory Control in the Manu- 

 facture of Foods. 

 W. D. BIGELOW, Washington, D. C. 



The Preservation of Foodstuffs. 



CARL Iy. ALSBERG, Chief, Bureau of Chemistry, Department of 

 Agriculture, Washington, D. C. 



Toxicological Analyses of Mercury. 



CARLOS REN SON, San Salvador, Salvador. 



THURSDAY AFTERNOON, DECEMBER 30, 19152.30 O'CLOCK. 

 Joint Sessions Subsections 2 (Metallurgy) and 3 (Geology). 



PRIVATE DINING ROOM, RALEIGH HOTEL. 



GEORGE OTIS SMITH, Chairman. 

 TULIO OSPINA, Honorary Chairman. 



Metallurgical Practices at the Tin Mines of Bolivia. 



SCOVILL K. HOLLISTER, Mill Superintendent, Compania Estanifera, 

 L/lallagua, Bolivia. 



Bolivian Tin. 



ROWLAND BANCROFT, Mining Geologist, Denver, Colo. 



The Occurrence and Preparation of Radium and Associated Metals. (Illus- 

 trated by lantern slides and motion pictures, showing work of 

 Bureau of Mines.) 



CHARLES L. PARSONS, Chief Mineral Technologist, United States 

 Bureau of Mines, Washington, D. C. 



Radioactive Minerals of Brazil. 

 L/uis BETIM PAES LEME. 



General and Economic Geology of Colombia. 



TULIO OSPINA, Mining Engineer, Medellin, Colombia. 



