134 Report of the Chemist of the 



Potash which is not thus soluble cannot legally be included in 

 the statement. 



There is no provision which would prevent one expressing 

 the equivalent of potash in the form of sulphate or muriate of 

 potash in addition to potash; but, if only one form is given, it 

 must be always that of potash (K2O) soluble in distilled water. 

 To state only the amount of sulphate of potash, or muriate of 

 potash, or to use alone such expressions as "potash s." or " pot- 

 ash sul." is a clear violation of the provisions of the law. 



(d) Suggested Form of Statement of Guarantee-Analysis. — For 

 the sake of unformity and simplicity, we suggest to manufactur- 

 ers of fertilizers the following form of statement of guarantee- 

 analysis as one ivkich loill he accepted by this Station as conforming 

 to the provisions of the laio: 



Nitrogen per cent. 



Available phosphoric acid per cent. 



(Total phosphoric acid in case of undissolved bone) per cent. 



Potash (K 2 O) soluble in distilled water per cent. 



This form is simple, is all the law requires and is suflSciently 

 complete to give consumers an intelligent idea of the chemical 

 composition. Whatever is added to this is very apt to prove 

 confusing to the average farmer. When any constituent is ab- 

 sent from a fertilizer, that constituent can be omitted from the 

 guarantee-statement of chemical composition. Thus, if a fer- 

 tilizer contains no nitrogen, it is not necessary to state that no 

 nitrogen is present; the nitrogen is simply dropped from the 

 statement. 



(e) Fixed Figures in Statement of Composition. — In the interest 

 of clearness and simplicity, we suggest that manufacturers give 

 only the one figure representing the lower limit of guarantee 

 instead of stating an upper and lower limit. Several manufac- 

 turers have voluntarily adopted this system already. In our 

 publications of guarantee-analyses, we state only the lower 

 limit, because this is the only figure officially recognized by us 

 as representing the guarantee. 



