MASSACHUSETTS STATE 



Agricultural Experiment Station, 



MARCH, 1893. 



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COMMERCIAL FERTILIZERS. 



The duties assigned to the director of the station, to act as inspec- 

 tor of commercial fertilizers, render it necessary to discriminate in 

 official publications of the results of analyses of commercial fertilizers 

 and of manurial substances in general made at the sttition, between 

 analyses oj samples collected by a duly qualified delegate of the Experi- 

 ment Station, in conformity with the mode prescribed by the laws of 

 our State for the regulation of the trade in Commercial Fertilizers^ 

 and those analyses which are made of samples sent on for that purpose 

 by outside parties. In regard to the former alone, can the director 

 assume the responsibility of a cai-efully prepared sample, and of the 

 identit}' of the article in question. 



The official report of analyses of compound fertilizers and of all 

 such materials as are to be used for manurial purposes, which are 

 sold in this state under a certificate of compliance with the present 

 laws for the regulation of the trade m these articles, has been 

 restricted by our state laws to a statement of chemical composition 

 and to such additional information as relates to the latter. 



The practice of affixing to each analysis of this class of fertilizers 

 an approximate commercial valuation per ton of the amount of their 

 principal constituents found present, has therefore to be discontinued. 



