The Bulletin. 7 



Relative value per ton, or the figures showing this, represents the 

 prices on board the cars at the factory, in retail lots of five tons or 

 less, for cash. 



To make a complete fertilizer the factories have 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 fertilizers. 



The values used last season were : 



VALUATIONS FOR 1909. 



In Unmixed or Raw Materials. 



For phosphoric acid in acid phosphate. ... 4 cents per pound. 

 For phosphoric acid in bone meal, basic slag 



and Peruvian guano 31^ cents per pound. 



For nitrogen 18 cents per pound. 



For potash 5 cents per pound. 



In Mixed Fertilizers. 



For phosphoric acid 41/^ cents per pound. 



For nitrogen 19^ cents per pound. 



For potash 5I/2 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 hun- 

 dred, 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 con- 

 tains available phosphoric acid 8 per cent, potash 2 per cent, and 

 nitrogen 1.65 per cent, the calculation is made as follows: 



Percentage, or Lbs. in 100 Lbs. ^-fi^rF^^ ^^^o^^^fl' ^°°' 



100 Lbs. 2,000 Lbs. 



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



2 pounds potash at 5% cents 0.11 X20= 2.20 



1.65 pounds nitrogen at 19^^ cents ^ 0.321x20= 6.42 



Total value 0.791x20= $15.82 



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

 Freight rates from the seaboard and manufacturing centers to interior 

 points are given in the following table : 



