COMMERCIAL FERTILIZERS. 



319 



Nitrogen (in ammonia salts), 

 Nitrogen (in nitrates), . 

 Insoluble matter, 



Per cent 

 2.04 



.86 

 .90 



Valuation per two thousand pounds : — 



141.2 pounds of soluble phosphoric acid, 

 46.6 pounds of reverted phosphoric acid, 

 77.4 pounds of insoluble phosphoric acid, . 



135.2 pounds of potassium oxide, . 

 30.6 pounds of nitrogen (in organic matter), 

 40 8 pounds of nitrogen (in ammonia sal(s), 

 17.2 pounds of nitrogen (in nitrates), . 



Bay Stale Bone Superphosphate. 



$45 74 



(J. A. Tucker & Co., Boston, Mass.; collected of Clark & Son, Worcester, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 9.2 pei 

 cent. ; insoluble phosphoric acid, 3 percent. ; nitrogen, 2.71 

 per cent, (equivalent to ammonia, 3.29 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen, .... 

 Insoluble matter, 



Per cent. 

 22 28 



10.30 

 8.51 



.52 

 1.27 

 1.57 

 1.59 



.60 



Valuation per two thousand pounds : ■ 



170.2 pounds of soluble phosphoric acid, 

 10.4 pounds of reverted phosphoric acid, 

 25.4 pounds of insoluble phosphoric acid, 

 31.4 pounds of potassium oxide, . 

 31.8 pounds of nitrogen, 



$26 79 



Steams' Ammoniated Bone Superphosphate. 

 (Collected of Wilson & Holden, Worcester, Mass.) 



Guaranteed composition: MoLsture, 12 to 15 per cent.; 

 ammonia, 3 to 4 per cent, (equivalent to nitrogen, 2.5 to 3.3 

 per cent.) ; .soluble phosphoric acid, 8 to 11 per cent. ; in- 



