THE PHOSPHATES OF AMERICA. 



WHERE AND HOW THEY OCCUR; HOW THEY ARE 

 MINED; AND WHAT THEY COST. 



WITH 



TREATISES 



ON THE 



MANUFACTURE OF SULPHURIC ACID, ACID PHOSPHATE, PHOS- 

 PHORIC ACID, AND CONCENTRATED SUPERPHOSPHATES, 

 AND SELECTED METHODS OF CHEMICAL ANALYSIS. 



BY 



FEANOIS .WYATT, 



THE SCIENTIFIC PUBLISHING CO., 



27 PARK PLACE, NEW YORK. 



1891. 



