12 



CONTROL SERIES NO. 150 

 PHOSPHORIC ACID COMPOUNDS 



Manufacturer and Brand 



Total 

 Phos- 

 phor'c 

 Acid 



Available 

 Phosphoric Acid 



Found 



Guaran- 

 teed 



American Agricultural Chemical Co. 



AA Quality Phosphate Rock 



18% Normal Superphosphate 



Armour Fertilizer Works 



Armour's Big Crop Superphosphate 20% 



Consolidated Rendering Co. 



Corenco Superphosphate 20% 



Davison Chemical Corp. 



Davco Granulated 20% Superphosphate 



Eastern States Farmers' Exchange, Inc. 



Superphosphate 20% 



Farm Bureau Association 



Farm Bureau Superphosphate 20% 



Fox Point Chemical Co 



Old Fox Superphosphate 20% 



International Minerals & Chemical Corp. 



International Superphosphate 20% 



Old Deerfield Fertilizer Co., Inc. 



Old Deerfield Superphosphate 20% 



Rogers & Hubbard Co. 



Superphosphate 20% 



32 33 a 

 jl8.66b 

 119.07 



/20.55 

 \20.66 



21.62 

 21.98 

 20 66 

 20.45 

 21.83 

 21.27 

 20.91 



18.00 

 18.49 



20.53 

 20.28 



20 56 

 20.02 

 20. 3S 

 20.41 

 20.18 

 21.11 

 20 59 



18.00 

 18.00 



20.00 



20.00 

 20.00 



20 00 

 20.00 

 20.00 

 20.00 

 20 00 

 20.00 

 20 00 



a Guaranteed 30% total phosphoric acid. 

 b Composite of 3 sample*. 



POTASH COMPOUNDS 

 Muriate of Potash 



Manufacturer 



Eastern States Farmers' Exchange, Inc.. 

 International Minerals & Chemical Corp, 

 Old Deerfield Fertilizer Co., Inc 



Water Soluble Potash 



