INSPECTION OF COMMERCIAL FERTILIZERS 



37 



Phosphoric Acid Compounds 



Superphosphate, Precipitated Bone and Basic Slag Phosphate 



Manufacturer and Brand 



Acme Guano Co. 



Sergent's 16% Superphosphate . . . . 

 American Agricultural Chemical Co. 



AA 16 % Superphosphate 



AA 16 % Superphosphate 



AA 20% Superphosphate 



Co-Op 16% Superphosphate 



Apothecaries Hall Co. 



Superphosphate 16% 



Superphosphate 20% 



Armour Fertilizer Works 



Armours Big Crop Superphosphate 16% 



Armours Big Crop Superphosphate 20% 

 Berkshire Chemical Co. 



Berkshire Superphosphate 16 % 



Berkshire Precipitated Bone 



Consolidated Rendering Co. 



Superphosphate 16 % 



Superphosphate 16 % 



Davison Chemical Corp. 



Davco Granulated 20 % Superphosphate 

 Eastern States Farmers' Exchange 



Eastern States 20%, Superphosphate (Granular) . 



Eastern States 20% Superphosphate (Pulverized) 



Eastern States 40 % Double Superphosphate 

 (Granular) 



Eastern States 40% Double Superphosphate 

 (Pulverized) 



Eastern States Precipitated Bone .... 

 International Agricultural Corp. 



International Superphosphate 



International Superphosphate 



International 20% Superphosphate 



International Basic Slag 



Old Deerfield Fertilizer Co., Inc. 



Old Deerfield 16% Superphosphate 

 Rogers & Hubbard Co. 



Superphosphate 16% 



Superphosphate 20% 



Standard Wholesale Phosphate & Acid Works, 

 Inc. 



Standard Superphosphate 16 % 



Standard Superphosphate 20% . . . . 

 C. P. Washburn Co. 



Superphosphate 



20% Superphosphate 



Number 



of 

 Samples 



Total 

 Phos- 

 phoric 

 Acid 



16.01 



17.85 

 17.68 

 21.49 

 17.65 



17.42 

 21.65 



17.42 

 38.59 



17.03 

 16.51 



41.88 

 41.37 



16 58 

 16.65 

 20 67 

 17.41 



17.71 



16.91 

 21.40 



20.28 

 20 64 



16.97 

 21.28 



Available 

 Phosphoric Acid 



Found Guaran- 

 teed 



15.76 



16.82 

 16.55 

 20.68 

 16.68 



16.49 

 20.53 



20.48 



20 80 

 20.53 



40.86 



40.76 



16. 2C 

 16.30 

 20.41 

 15.90 



17.13 



16.71 

 21.09 



19.74 

 20.51 



16.27 

 20.97 



16.00 



16.00 

 16.00 

 20.00 

 16.00 



16.00 

 20.00 



16.00 

 20.00 



16.00 

 38.00 



20.00 

 20.00 



16.00 

 16.00 

 20.00 

 14.00 



16.00 



16.00 

 20.00 



16.00 

 20.00 



16.00 

 20.00 



Potash Compounds 



Sulfate of Potash-Magnesia 



Also contained 5.87% calcium oxide. 



