INSPECTION OF. COMMERCIAL FERTILIZERS 55 



Series I. — Unwashed, (a) 



(a) By "unwashed" is meant the original ground material as furnished to the trade; "washed" 

 designates each product largely freed from water soluble nitrogen by successive washings with water. 

 (6) Potash and phosphoric acid IJ^ times the usual quantity, 

 (c) Double amount of nitrogen used. 



