276 



BOARD OF AGRICULTURE. 



XVII. — Stockbridge Fertilizer eor Onions. Manufactured by 

 Messrs. W. H. Bowker & Co., Boston, Mass. 



(Collected of Mr. W. S. Westcott, Amherst, Mass.) 



Represented. 



Soluble phosphoric acid, 

 Reduced " " 



Insoluble " " 



Nitrogen, 

 Potassium oxide, . 

 Moisture, 



2 to 3 per cent. 



5 to 7 per cent. 

 4 to 6 per cent. 



Valuation per ton of 2,000 pounds. 



59.60 pounds of soluble phosphoric acid, 



36.60 . " of reduced 

 5.80 " of insoluble " " 



147.20 " of nitrogen, 

 166.60 " of potassium oxide, . 



$7 45 



3 30 



34 



30 92 



12 45 



$54 46 



