8 The Bulletin 



In Mixed Fertilizers 



For phosphoric acid 5 cents per pound 



For nitrogen .' 21 cents per pound 



For potash 25 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 hundre'3 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 : 



Value per Value per Ton, 

 Percentage or Lbs. in 100 Lbs. 100 Lbs. 2,000 Lbs. 



8 pounds available phosphoric acid at 5 cents 0.40 X20 % 8.00 



1.65 pounds nitrogen at 21 cents 0.3465X20 6.93 



2 pounds potash at 25 cents 0.50 X20 10.00 



Total value 1.2465X20 $24.93 



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



