160 Fertilizers 



and sells for $20 a ton; and No. 2 is guaranteed to con- 

 tain: 



Nitrogen 4% 



Phosphoric acid (available) 8% 



Potash 2% 



and sells for $22 a ton. The farmer who buys on the 

 ton basis, or is guided only by the ton price, will be in- 

 duced to purchase the No. 1 brand, because by so doing 

 he apparently saves $2 a ton. The one who studies the 

 relation of guarantee to selling price will purchase the 

 No. 2 brand, because he finds, from a simple calculation, 

 that it furnishes the constituents at just one-half the cost 

 per pound of the No. 1 brand, notwithstanding the higher 

 ton price, which is shown by the following calculation : 



No. 1 



Lbs. Cts. 



to the ton tothelb. 



Nitrogen 1% X 20 = 20 30 = $6 00 



Phosphoric acid (available) 6% X 20 = 120 @ 10 = 12 00 



Potash 1% X 20 = 20 @ 10 = 200 



$2000 

 No. 2 



Lbs. Cts. 



to the ton to the Ib. 



Nitrogen 4% X 20 = 80 @ 15 = $12 00 



Phosphoric acid (available) 8% X 20 = 160 5 = 8 00 



Potash 2% X 20 = 40 5 = 200 



$2200 



In reality, the fertilizer at $22 a ton is cheaper than the 

 one at $20 a ton. 



No. 1 No. 8 



Nitrogen $030 $015 



Phosphoric acid (available) . . 10 05 



Potash 10 05 



This may seem an extreme case, but it is well within 

 the facts, which may be ascertained by consulting the 



