494 



BOARD OF AGRICULTURE. 



Valuation per two thousand pounds : 



65.8 pounds of soluble phosphoric acid, 

 71.8 pounds of reverted phosphoric acid, 

 35.4 i^ounds of insoluble phosphoric acid, 

 162. pounds of potassimn oxide, . 

 80.4 pounds of nitrogen, 



$32 66 



H. L. Phelps' Complete Manure for Potatoes. 

 (Collected of Prentiss, Brooks & Co., Holyoke, Mass.) 



Guaranteed composition : Available phosphoric acid, 5 to 

 6 per cent. ; insoluble phosphoric acid, 2 to 3 per cent. ; 

 potassium oxide, 8 to 10 per cent. ; ammonia, 5 to 6 per 

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



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosiDhoric acid, 

 Insoluble phosphoi'ic acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



7.89 

 8.29 

 2.19 

 3.43 

 2.07 

 9.33 

 3.85 

 1.18 



Valuation per two thousand pounds : 



43.8 pounds of soluble phosphoric acid, 

 68.6 jjounds of reverted phosphoi'ic acid, 

 63.4 pounds of insoluble phosphoric acid, 

 186.0 pounds of potassium oxide, 

 77. pounds of nitrogen, 



$3 50 



6 15 

 1 CO 



7 93 

 3 48 



f31 66 



I 



