ECONOMIC GEOLOGY 



BY 



CHARLES H. RICHARDSON 



PROFESSOR OP MINERALOGY AND ECONOMIC GKOLOOY, 

 SYRACUSE UNIVERSITY, NEW YORK 



McGRAW-HILL BOOK COMPANY, INC. 

 239 WEST 39TH STREET-] NEW YORK 



6 BOUVERIE STREET. LONDON, E. C. 



v 1913 



