No. 7. 



DEPARTMENT OF AGRICULTURE. 



765 



A corapaiison of the avegage composition of all samples of com- 

 I»lel(' fertilizers for which guaranties are recorded with the average 

 of the corresponding guaranties, for several seasons past including 

 those of this season followa: 



Average Composition and Guaranty Compared. 



Fall, 1901. 

 Phosphoric acid: 



Total 



Available 



Potash 



Nitrogen 



Spring, 190C. 

 Phosphoric acid: 



Total 



Available, 



Potash 



Nitrogen, 



Fall, 1902. 

 Phosphoric acid: 



Total 



Available, 



Potash 



Nitrogen, 



Spring, 190S 

 Phosphoric acid: 



"Total 



Available 



Potash, 



Nitrogen 



Fall, 1903. 

 Phosphoric acid: 



Total, 



Available, 



Potash 



Nitrogen, 



Spring, 1004. 

 Phosphoric acid: 



Total 



Available, 



Potash 



Nitrogen, 



Phosphoric add: 



Total 



Available, 



Potash, 



Nitrogen 



If is of interest to note how closely the system of valuations, 

 based upon the wholesale prices of raw materials in the principal 

 markets during the most important buying season and upon certain 

 average allowances for expense and profit on the part of the mixer 

 and jobber, coincides witli the retail prices later ascertained. A 

 comparison for several seasons past is given below: 



