6 N. H. Agr. Experiment Station [Bulletin 288 



ficient 0.64 per cent. The average of the other 13 de- 

 ficiencies was 0.27 per cent. 



Nineteen brands contained less potash than the 

 guarantee. The greatest deficiency was 1,74 per cent. 

 The average of the other 18 potash deficiencies was 0.27 

 per cent. 



The analytical figures which follow show that in 34 

 cases the percentage found is exactly equal to the per- 

 centage guaranteed. In 22 cases the average of dupli- 

 cate determinations gave these figures within 0.005 per 

 cent. In the remaining 12 cases the deficiency was not 

 greater than 0.02 per cent nitrogen and 0.03 per cent 

 phosphoric acid or potash. When the manufacturer 

 fails to meet his guarantee by an amount no greater 

 than the experimental error in the determination, the 

 analyst is not warranted in declaring the guarantee not 

 met. 



In the tabulation of the analyses in the following 

 pages deficiencies of one-fourth of one per cent or more 

 are shown in bold-faced type. The manufacturers are 

 arranged alphabetically. The brand name is listed al- 

 phabetically or numerically by formula under the manu- 

 facturer. 



