COMMERCIAL FERTILIZERS. 



205 



Williams, Clark <fc Co.''s Fish and Potash. 

 (Collected of Slate and DeAVolf, Greenfield, Mass.) 



Guaranteed composition : total phosphoric acid, 3 to 4 per 

 cent. ; potassium oxide, 3 to 4 per cent. ; ammonia, 4 to 5 

 per cent, (equivalent to nitrogen, 3.30 to 4.13 per cent.). 



Moisture at 100° C , . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosjjhoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen, .... 



Valuation per two thousand pounds : — 



55. pounds of reverted phosphoric acid, 

 66.6 pounds of insoluble phosphoric acid, 

 61.2 pounds of potassium oxide, 

 64.4 pounds of nitrogen, .... 



Per cent. 

 10.98 

 6.08 

 .00 

 2.75 

 3.33 

 3.06 

 3.22 



$25 81 



Bradletfs Fish and Potash. 

 (Collected of Sheldon and Newcomb, Greenfield, Mass.) 



Guaranteed composition : potassium oxicle, 4 to 5 per 

 cent. ; ammonia, 4 to 5 per cent (equivalent to nitrogen 

 3.3 to 4.1 per cent.). 



Per cent. 



Valuation per two thousand pounds : — 



19 2 pounds of soluble phosphoric acid, . 

 29.0 pounds of reverted phosphoric acid, 

 40. pounds of insoluble phosphoric acid, 

 98.4 pounds of potassium oxide, 

 73.8 pounds of nitrogen. 



$27 98 



