408 FINAL ACT OF SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 



JIMENEZ NUNEZ, Jos, President of the Faculty of Dentistry, San Jos, 



Costa Rica, Central America. 

 Member Cooperating Committee, Costa Rica. 



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



Washington, D. C. 

 Papers presented : 



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

 Filtration of the Yellow Precipitate in Phosphoric-Acid Esti- 

 mations. 



The Application of the Paper Pulp Filter to the Quantitative Esti- 

 mation of Calcium and Magnesium. 



JOHNSON, ALBA B., President, Baldwin Locomotive Works, Philadelphia, 



Pa. 



Honorary Member. 



Delegate Philadelphia Chamber of Commerce. 

 National Foreign Trade Council. 



JOHNSON, EMORY R., Professor, University of Pennsylvania, Philadelphia, 

 Pa. 



Delegate American Academy of Political and Social Sciences. 



Member of Committee, Subsection i , Section IX. 



Paper presented : Some Problems and Principles of Government Regu- 

 lation of Railroads. 



JOHNSON, JOSEPH FRENCH, New York University, New York, N. Y. 



Paper presented: Special Courses for Commercial Study Alexander 

 Hamilton Institute. 



JOHNSON, Lucius E., Bureau of Railway Economics, Home Building, 



Thirteenth and F Streets NW., Washington, D. C. 

 Delegate Bureau of Railway Economics. 

 JOHNSON, ROSWELL H., Professor, University of Pittsburgh, Pittsburgh, 



Pa. 



Delegate University of Pittsburgh. 

 Paper presented: Legal and Economic Factors in the Conservation 



of Oil and Gas. 

 JOHNSTON, ARCHIBALD, Vice President Bethlehem Steel Corporation, 



120 Church Street, Bethlehem, Pa. 

 Delegate Bethlehem Steel Corporation. 

 JOHNSTON, GEORGE BEN, Medical Society of Virginia, 200 East Franklin 



Street, Richmond, Va. 

 Delegate Medical Society of Virginia. 



