The Bulletin. 7 



have two sets of valuations — one for the raw or unmixed materials, such 

 as acid phosphate, kainit, cotton-seed meal, etc., and one for mixed 

 fertilizers. 



The values used last season were : 



VALUATIONS FOR 1911. 

 In Unmixed or Raw Materials. 



For phosphoric acid in acid phosphate 4 cents per pound. 



For phosphoric acid in bone meal, basic slag, and Pe- 

 ruvian guano 31/^ cents per pound. 



For nitrogen 19% cents per pound. 



For potash 5 cents per pound. 



In Mixed Fertilisers. 



For phosphoric acid 4i/^ cents per pound. 



For nitrogen 21 cents per pound. 



For potash 5i/^ cents per pound. 



HOW RELATIVE VALUE IS CALCULATED. 



In the calculation of relative value it is only necessary to remember 

 that so many per cent means the same number of pounds per hundred, 

 and that there are twenty hundred pounds in one ton (2,000 pounds). 



With an 8-2-1.65 goods, which means that the fertilizer contains avail- 

 able phosphoric acid 8 per cent, potash 2 per cent, and nitrogen 1.65 

 per cent, the calculation is made as follows : 



8 pounds available phosphoric acid at 4i^ cents. . . 0.36 X20= $ 7.20 



2 pounds potash at 5^1 cents 0.11 X20= 2.20 



1.65 pounds nitrogen at 21 cents 0.347x20= 6.94 



Total value 0.817X20= $16.34 



Freight and merchants' commission must be added to these prices. 

 Freight rates from the seaboard and manufacturing centers to interior 

 points are given in the following table. 



