The Bulletin. 7 



To make a complete fertilizer the factories tave to mix together in 

 proper proportions materials containing ammonia, phosphoric acid and 

 potash. This costs something. For this reason it is thought well to 

 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 fer- 

 tilizers. 



The values used last season were: 



VALUATIONS FOR 1913. 



In Unmixed or Raw Materials. 



For phosphoric acid in acid phosphate 4 cents per pound. 



For phosphoric acid in bone meal and Peruvian Guano. 3% cents per pound. 



For phosphoric acid in basic slag 4 cents per pound. 



For nitrogen 19i^ cents per pound. 



For potash 4 cents per pound. 



In Mixed Fertilizers. 



For phosphoric acid 4^^ cents per pound. 



For nitrogen 21 cents per pound. 



For potash 5 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: 



-r^ ■ -inr. TT, Vttlue Per Value Per Ton, 



Percentage or Lis. in 100 Lis. ^^^ ^^^ ^,000 Lbs. 



8 pounds available phosphoric acid at 41/2 cents... 0.36 X20= $ 7.20 



2 pounds potash at 5 cents 0.10 X20= 2.00 



1.65 pounds nitrogen at 21 cents 0.347X20= 6.95 



Total value 0.817X20= $16.14 



Freight and merchant's commission must be added to these prices. 



