6 The Bulletin. 



In Mixed Fertilizers. 



Phosphoric acid 41/2 cents per pound. 



Ammonia ^^V2 cents per pound. 



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 

 poimds). 



With an 8 — 2 — 2 goods, which means that the fertilizer contains 

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

 2 per cent, the calculation is made as follows : 



Percentage or I^bs. Value Per Value Per Ton 



in 100 Lbs. 100 Lbs. 2,000 Lbs. 



8 pounds available phosphoric acid at 4j cents 0.36X20= $7.20 



2 pounds potash at 5J cents 0.11 X 20= 2. 20 



2 pounds ammonia at 16^ cents 0.33X20= 6.60 



Total value 0.80X20= 16.00 



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

 Freight rates from the seaboard and manufacturing centers to inte- 

 rior points are given in the following table : 



