260 FINAL ACT OF SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 

 Subsection 49.30 O'Clock. 

 ROOM C, RALEIGH HOTEL. 



C. E. MUNROE, Chairman. 



W. P. MASON, Honorary Chairman. 



The Determination of Active Oxygen in Washing Perborates. 

 A Contribution to the Study of Coloring Lakes. 



P. B. GUGGIARI, Professor of Chemistry, University of Paraguay, 

 Asunci6n, Paraguay. 



Explosives for Use in Industrial and Commercial Development. 



C. E. MUNROE, Dean, Graduate Studies, George Washington Uni- 

 versity, Washington, D. C. 



Recent Development in Water Purification and Sewage Disposal. 

 W. P. MASON, Rensselaer Polytechnic Institute, Troy, N. Y. 



Pharmaceutical Products Made from Materials Native to Latin America. 

 A. R. D. DOHME, Chemist, Baltimore, Md. 



A Simple, Efficient, and Economic Filter; Its Application to the Filtration 



of the Yellow Precipitate in Phosphoric-acid Estimations. 

 S. L. JODIDI, Organic Chemist, United States Department of 

 Agriculture, Washington, D. C. 



TUESDAY AFTERNOON, JANUARY 4, 19162.30 O'CLOCK. 

 Joint Session Subsections 1, 2, and 3 of Section VII with Subsection 1 of Section III. 



OAK ROOM, RALEIGH HOTEL. 



M. R. CAMPBELL, Chairman. 



Fuel Situation in the Andean Plateau. 



BENJAMIN L. MILLER, Professor of Geology, Lehigh University, 

 South Bethlehem, Pa., and JOSEPH T. SINGEWALD, Jr., Asso- 

 ciate, Economic Geology, Johns Hopkins University, Baltimore, 

 Md. (Section VII, Subsection i.) 



Practical Difficulties in Conserving our Coal Supply. 



J. S. BURROWS, Norfolk Va. (Section III, Subsection i.) 



Saving of Coal through Employment of Better Methods of Mining. 



FRANK HAAS, Assistant General Manager, Fairmont Coal Com- 

 pany, Fairmont, W. Va. (Section III, Subsection i.) 



