546 



BOAKD OF AGRICULTURE. 



soluble phosphoric acid, 1 to 2 per cent. ; potassium oxide 

 (sulphate), 1 to 3 per cent. ; ammonia, 3.5 to 4.5 per cent, 

 (equivalent to nitrogen, 2.9 to 3.7 per cent.). 



Valuation per two thousand pounds : — 



148 4 pounds of soluble phosphoric acid, 

 39.6 pounds of reverted phosphoric acid, 

 37.4 pounds of insoluble phosphoric acid, 

 25.8 pounds of potassium oxide, . 

 42 6 pounds of nitrogen, 



$24 62 



H. L. Phelps' Complete Manure for Grass. 



(M. L. Shoemaker & Co., Philadelphia, Pa.; collected of Slate & DeWolf, Green- 

 field, Mass.) 



Guaranteed composition : Total phosphoric acid, 8 to 10 



per cent. ; soluble and reverted phosphoric acid, 4 to 5 per 



cent ; potassium oxide, 7 to 8 per cent. ; ammonia, 5 to 6 



per cent, (equivalent to nitrogen, 4.1 to 5 per cent.). 



Per ceut. 



Moisture at 100° C, 9.35 



Total ijhosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble i^hosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



9.48 

 4.54 

 2.75 

 2.06 

 7.62 

 3.93 

 1.83 



Valuation per two thousand pounds : — 



90 8 pounds of soluble i)hosphoric acid, 

 55. pounds of reverted pliosphoric acid, 

 41.2 pounds of insoluble phosphoric acid, . 

 152.4 pounds of potassium oxide, . 

 78.6 pounds of nitrogen, .... 



$32 47 



