222 Report of tue Chemist of the 



(3) Available Phosphoric Acid. The 482 brands of complete 

 fertilizers contained available phosphoric acid varying in amount 

 from 1.20 to 15.12 per ct. and averaging 8.Y6 per ct. The aver- 

 age amount of available phosphoric acid found by the Station 

 analysis exceeded the average guaranteed amount by 0.98 per ct., 

 the guaranteed average being 7.78 per ct, and the average found 

 being 8.76 per ct. 



In 418 brands of complete fertilizers, the amount of available 

 phosphoric acid found was equal to or above the amount guaran- 

 teed, the excess varying from 0.03 to 6.32 per ct. and averaging 

 1.23 per ct. 



In 64 brands, the available phosphoric acid was below the guar- 

 anteed amount, the deficiency varying from 0.02 to 3.68 per ct. 

 and averaging 0.46 per ct. In 44 cases the deficiency was below 

 0.5 per ct. 



The amount of water-soluble phosphoric acid varied from to 

 10.28 per ct. and averaged 5.40 per ct. 



(4) Potash. The complete fertilizers contained potash varying 

 in amount from 0.43 to 12.95 per ct. and averaging 4.86 per ct. 

 The average amount of potash found by the Station analysis ex- 

 ceeded the average guaranteed amount by 0.30 per ct., the guar- 

 anteed average being 4.56 per ct. and the average found being 

 4.86 per ct. 



In 331 brands of complete fertilizers, the amount of potash 

 found was equal to or above the guaranteed amount, the excess 

 varying from 0.01 to 3.07 per ct. and averaging 0.59 per ct. 



In 151 brands, the potash was below the guaranteed amount, 

 the deficiency varying from 0.01 to 4.36 per ct. and averaging 

 0.50 per ct. In 105 of these cases, the deficiency was less than 

 0.5 per ct. 



In 85 cases among the 482 brands of complete fertilizers the 

 potash was contained in the form of sulphate free from an excess 



of chlorides. 



(5) The retail selling price of the complete fertilizers varied 

 *>om $17 to $45 a ton and averaged $26.66. The retail cost of 



