174 



The Phosphates of America, 



ANTHON'S TABLE BY WHICH TO PREPARE SULPHURIC ACID (OIL OF VITRIOL) OF ANY 

 STRENGTH BY MIXING THE ACID OF 1.86 SPECIFIC GRAVITY WITH WATER. 



TABLE SHOWING THE STRENGTH OF SOLUTIONS OF PHOSPHORIC ACID BY SPECIFIC 

 GRAVITY AT 15 a C. 



