316 



BOAED OF AGRICULTURE. 



Valuation per two thousand pounds : — 



19.8 pounds of soluble phosphoric acid, 

 52> pounds of reverted phosphoric acid, 

 75. pounds of insoluble phosphoric acid, 

 70 2 pounds of potassium oxide, . 

 62.8 pounds of nitrogen. 



$25 58 



RandaWs Field and Farm Fertilizer. 

 (Boston Fertilizer Co., Boston, Mass. ; collected of W. E. Livingston.) 



Guaranteed composition: Total phosphoric acid, 10 to 14 

 per cent. ; soluble phosphoric acid, 7 to 8 per cent. ; re- 

 verted phosphoric acid, 1 to 2 per cent. ; nitrogen, 2 to 2.9 

 per cent, (equivalent to ammonia, 2| to 2)\ per cent.); 

 potassium oxide, 2 to 3 per cent. ; moisture, 10 to 14 per 

 cent. 



Valuation per two thousand pounds : — 



98.8 pounds of soluble phosphoric acid,l 

 6G. pounds of reverted phosphoric acid, 

 42.6 pounds of insoluble phosphoric acid, , 

 18. pounds of potassium oxide, . 

 41.8 pounds of nitrogen (in organic matter), 

 6.G pounds of nitrogen (in ammonia salts), 



$28 31 



Ames Raw Bone Superphosphate. 

 (Collected by Chas. II. Preston, Assistant of Inspector.) 



Guaranteed composition : Total phosphoric acid, 13 to 15 

 per cent. ; soluble phosphoric acid, 9 to 11 per cent. ; re- 

 verted phosphoric acid, 2 to 3 per cent. ; ammonia, 3.V to 4^ 

 per cent, (equivalent to nitrogen, 2*9 to 3.7 per cent.). 



