318 



BOARD OF AGRICULTUEE. 



8.8 pounds of nitrogen (in nitrates), 

 56.6 pounds of nitrogen (in organic matter), 

 55.6 pounds of potassium oxide, . 



Superphosphate of Lime. 



%l 58 



11 32 



2 36 



$36 85 



(Bosworth Bros., Putnam, Conn. ; collected of Wilson & Holden, Worcester, Mass.) 



Guaranteed composition : Nitrogen 2 to 2| per cent. ; sol- 

 uble phosphoric acid, 4 to 5 per cent. ; reverted phosphoric 

 acid, 3 to 5 per cent, ; insoluble phosphoric acid, 7 to 9 per 

 cent. ; potassium oxide, 2 to 3 per cent. 



Per cent. 



14.75 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, 



Valuation per two thousand pounds : — 



69. pounds of soluble phosphoric acid, 

 99.2 pounds of reverted phosphoric acid, . 

 107.8 pounds of insoluble phosphoric acid, . 

 42. pounds of potassium oxide, . 

 60.8 pounds of nitrogen, .... 



13.80 

 3.45 

 4.96 

 5.39 

 2.10 

 2.54 

 .80 



$6 90 

 8 93 

 4 85 

 1 78 



10 16 



$32 62 



napes' Corn Manure. 

 (Collected of W. H. Earle & Co., Worcester, Mass.) 



Guaranteed composition : Ammonia, 4.5 to 5 per cent, 

 (equivalent to nitrogen, 3.7 to 4 per cent.) ; phosphoric acid, 

 10 to 12 per cent. ; potassium oxide, 6 to 7 per cent. ; mag- 

 nesium, calcium, soda, sulphuric acid, etc., 70 to 80 per 

 cent. 



Per cent. 



Moisture at 100" C, 13.21 



Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Revei'ted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen (in organic matter), 



12.86 

 7.06 

 2.33 

 3.87 

 6.76 

 1.53 



