The Phosphates of America. 105 



Superintendence and management 2. 00 



General jobbing repairs 60 



Interest on capital, same terms as above 4. 60 



Total $26.50 



Product equals 4| tons of 50 B. 



Cost per ton $5.90 



We have already hinted at the feasibility of manufacturing 

 the acid in the vicinity of the pyrites mines, but have not for- 

 gotten to add that its practicability must be established by clearly 

 demonstrating that the cost of carrying phosphates or 66 B. acid 

 is less than the freights now paid upon the pyrites ore. 



The problem deserves to be inquired into by capitalists, since 

 its favorable solution would still more reduce costs, as follows : 



COST OF ACID PRODUCTION AT THE MINES. 



2% tons of iron pyrites, containing 46 per cent, sulphur, at 



a maximum of Scents per unit delivered at the works. $5.75 

 Other charges, same as given in preceding table 12 . 70 



Total cost of 4| tons 50 B. acid $18.45 



Costperton $4.10 



To put it plainly, the manufacturer at the mines would be 

 working upon sulphur which, on an exactly equivalent chemical 

 basis of calculation, would cost him $15.25 less per ton than the 

 price paid for brimstone by his competitors. 



