264 FINAI, ACT OF SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 



Development Work and Mining Operations of the Chile Exploration 



Company. 

 POPE YEATMAN, Mining Engineer, New York, N. Y. 



History and Development of Gold Dredging in Montana. (Illustrated with 



lantern slides and motion pictures.) 

 HENNEN JENNINGS, Mining Engineer, Washington, D. C. 



Placer Mining Methods and Operating Costs. 



CHARLES JANIN, Mining Engineer, Bureau of Mines, San Francisco, 

 Cal. 



