6 The Bulletin. 



HOW BELATIVE 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 

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

 1.65 per cent, the calculation is made as follows : 



„ ... . „.._,.. Value Per Value Per Ton, 



Percentage, or Lbs. in 100 Lbs. 1QQ ^ ^ ^ 



8 pounds available phosphoric acid at 4% 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 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 : 



