18 



CONTROL SERIES NO. 162 

 PHOSPHORIC ACID COMPOUNDS 



Manufaclurei and Brand 



American Agricultural Chemical Co. 



AA Quality Phosphate Rock. . , 



18% Normal Superpliosphale. 



Consolidated Renderin}< Co. 



("ort-nco Superphosphate 20% 



Davison Chemical Corp. 



Dav'co Granulated Superphosphate 20' 



Eastern States Farmers' Exchange, Inc. 



Superphosphate 20' < 



Farm Bureau Association 



Superphosphate 20' ,, 



International Minerals <£ Chemical Corp. 



Superphosphate 20' J: 



Old Deerfield Fertilizer Co., Inc. 



.Superphosphate 20''i 



Rogers & Hubbard Co. 



Hubbard Superphosphate 20%, 



Total 

 Phos- 

 phoric 

 Add 



f.iO 80a 

 ;31 OOu 



Available 

 Phosphoric Acid 



Brand Seriously Deficient 



.•\rmour Fertilizer Works 



Big Crop Superphosphate 20' ,' (b) 



20 Of) 



a Guaranteed 30% total phosphoric acid. 



b .Approximate commemial shortage per ton. .$1.S3. 



POTASH COMPOUNDS 



Brand Seriously Deficient 



Consolidated Rendering Co. 



Muriate of Potash (fe) 



a Masnesium oxide found, 19.60%; guaranteed 18%. 

 b .\pproximate commercial shortage per ton. $1.28. 



