518 ANNUAL REPORT OF THE Off. Doc. 



Summary of Instances of Deficiency from Guaranty 



Deficient in four constituents 



Deficient in tliree constituents, 



Deficient in two constituents 



Deficient in one constituent 



Total number of samples iu wliicli deficiencies occur 



The cases of deficiency noted during the past nine seasons in the 

 composition of goods as compared with their guaranties, expressed 

 in percentage of the total number of goods of each class analyzed, 

 are as follows : 



Percentage of Deficiency, 1910-1915 



The work of this season shows an unusually excellent conformity 

 of composition to guaranty. 



A comparison of the average composition of all samples of com- 

 plete fertilizers for which guaranties are recorded with the average 

 of the corresponding guaranties, for several seasons past, including 

 those of this season, follows ; 



