530 



BOAED OF AGRICULTUEE. 



Valuation per two thousand pounds : 



62.8 pounds of soluble phosphoric acid, 

 72.4 pounds of reverted phosphoric acid, 

 51.4 pounds of insoluble phosphoric acid, 

 106.0 pounds of potassium oxide, . 

 60.8 pounds of nitrogen. 



f5 02 

 6 43 

 1 54 

 4 51 

 8 89 



$25 39 



Chittenden's Ammoniated Bone Superphosphate. 

 (Collected of T. E. Hall & Co., Pittsfield, Mass.) 



Guaranteed composition: Total phosphoric acid, 9 to 11 

 per cent. ; available phosphoric acid, 7 to 9 per cent. ; po- 

 tassium oxide, 2 to 4 per cent. ; ammonia, 2 to 3 per cent, 

 (equivalent to nitrogen, 1.65 to 2.5 per cent ). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble j^hosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



rer cent. 



13.48 

 12.73 

 6.79 

 2.39 

 3.55 

 4.79 

 3.40 

 3.73 



Valuation per two t^iousand pounds : — 



135.8 pounds of soluble phosphoric acid, 

 47.8 pounds of reverted phosphoric acid, 

 71.0 poimds of insoluble phosphoric acid, 

 95.8 pounds of potassium oxide, . 

 68.0 jiounds of nitrogen. 



$32 55 



Standard Ammoniated Bone Phosphate. 



(Manufactured by Farmers' Fertilizer Company, Syracuse, N. Y. ; collected of H. 

 P. Lucas, Pittsfield, Mass.) 



Guaranteed composition: Total phosphoric acid, 11 to 15 

 percent. ; available phosphoric acid, 9 to 11 per cent. ; in- 

 soluble phosphoric acid, 2 to 4 per cent. ; potassium sul- 

 phate, 8 to 9 per cent. ; ammonia, 1 to 2 per cent, (equiva- 

 lent to nitrogen, .82 to 1.65 per cent.). 



