392 Report of Inspection Work of the 



(3) Available phosphoric acid. The 334 brands of complete 

 fertilizers contained available phosphoric acid varying in 

 amount from 1.01 to 13.46 per ct. and averaging 8.80 per ct. 

 The average amount of available phosphoric acid found by the 

 Station analysis exceeded the average guaranteed amount by 

 1.13 per ct., the guaranteed average being 7.67 per ct. and the 

 average found being 8.80 per ct. 



In 304 brands of complete fertilizers, the amount of available 

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

 anteed, the excess varying from 0.01 to 4.81 per ct. and averaging 

 1.26 per ct. 



In 30 brands, the available phosphoric acid was below the 

 guaranteed amount, the deficiency varying from 0.01 to 7.72 per 

 ct. and averaging 0.74 per ct. In 24 cases the deficiency was 

 below 0.5 per ct. 



The amount of water-soluble phosphoric acid varied from to 

 10.77 per ct. and averaged 5.04 per ct. 



(4) Potash. The complete fertilizers contained potash vary- 

 ing in amount from 0.26 to 11.59 per ct., and averaging 4.47 per 

 ct. The average amount of potash found by the Station analysis 

 exceeded the average guaranteed amount by 0.34 per ct., the 

 guaranteed average being 4.13 per ct., and the average found 

 being 4.47 per ct. 



In 259 brands of complete fertilizers, the amount of potash 

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

 varying from 0.01 to 4.75 per ct. and averaging 0.55 per ct. 



In 75 brands, the potash was below the guaranteed amount, 

 the deficiency varying from 0.01 to 4.71 per ct. and averaging 

 0.40 per ct. In 59 of these cases, the deficiency was less than 

 0.5 per ct. 



In 70 cases among the 334 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 

 from $14 to $43 a ton and averaged $25.71. The retail cost of 

 the separate ingredients unmixed averaged $19.81, or $5.90 less 

 than the soiling price. 



