COMMERCIAL FERTILIZERS. 



225 



Valuation per two thousand pounds : — 



159.2 pounds of soluble phosphoric acid, 

 29. pounds of reverted phosphoric acid, 

 32.4 poumls of insoluble pho.sphoric acid, 

 40.8 pounds of potassium oxide, . 

 41. G pounds of nitrogen (in organic matter), 

 15 8 pounds of nitrogen (in nitrates), . 



$3G 23 

 Williams, Glark and Co., " Amcricus " Ammoniatcd Bone Superphosphate. 

 (Collected of Wilson and Holdcn, Worcester, Mass.] 



Guaranteed composition : soluble phosphoric acid, 6 to 8 

 per cent.; revcrlcd phosphoric acid, 3 to 4 per cent. ; in- 

 soluble pliosphoric acid, 1 to 3 per cent. ; potassium oxide, 

 1 to 2 per cent. ; ammonia, 2 to 3 per cent, (equivalent to 

 nitrogen, 1.7 to 2.5 per cent.). 



Per cent. 

 16.75 



Valuation per two thousand pounds : — 



133.6 pounds of soluble phosphoric acid, 

 21. i)nunds of reverted phosphoric acid, 

 71.2 pounds of insoluble phosphoric acid, 

 42.4 pounds of potassium oxide, . 

 47.6 pounds of nitrogen, 



$33 40 



L. L. Crocker''s Bone Sux)erphosphate, 

 (Collected of C. W. Sears, Worcester, Mass.) 



Guaranteed composition : soluble and reverted phosphoric 

 acid (availiible), 8 to 12 per cent. ; insoluble phosphoric 

 acid, 1 to 2 per cent. ; potassiun> oxide, 1 to 3 per cent. ; 

 ammonia, 3.5 to 4.5 percent, (equivalent to nitrogen, 2.9 to 

 3.7 per cent.). 



