40 



CONTROL SERIES No. 65 



Nitrogen Compounds. 



The chemicals and unmixed materials under this heading are valued chiefly 

 for the nitrogen which they contain. Some of them, however, contain more 

 than this one element: the nitrate of potash containing potash; the calcium 

 nitrate and cyanamid containing lime; and the organic vegetable substances 

 containing small quantities of phosphoric acid and potash, as will be noticed 

 by a reference to the summary table on the previous page. 



Brands showing a commercial shortage of one dollar or more per ton follow 

 the appropriate table, but are listed by themselves, serious deficiencies therein 

 being emphasized by boldface type. 



a Champion brand. 

 6 Standard brand. 



Nitrate of Potash. 



Manufacturer. 



American Agricultural Chemical Co. 

 Apothecaries Hall (.o. 

 Eastern States Farmers' Exchange 

 International Agricultural Corp. 

 Old Deerfield Fertilizer Co., Inc. 



Rogers & Hubbard Co. 



Number 



of 

 Samples. 



Guaran- 

 Found. teed. 



13.52 

 13.66 

 13.16 

 13.28 

 13.32 

 13.12 

 13.28 



13.00 

 13.00 

 13.00 

 13.16 

 13.00 

 13.00 

 13.00 



Potassium 

 Oxide. 



43.68 

 45.52 

 44.36 

 45.12 

 45.32 

 44.20 

 45.12 



Guaran 

 teed. 



44.00 

 44.00 

 44.00 

 44.00 

 44 00 

 44.00 

 44.00 



Chlor- 

 ine 



2.66 



1.24 



2.72 



1.48 



.49 



.74 



.59 



