512 



BOAED OF AGEICULTUEE. 



Church's '■'■Fish jind Potash." 

 (Collected of Gould & Co., Medfield, Mass.) 



Guaranteed composition : Total phosphoric acid, 5 to 6 

 per cent. ; potassium sulphate, 5 to 6 per cent. ; ammonia, 

 4 to 5 per cent, (equivalent to nitrogen, 3.3 to 4.1 per 

 cent.). 



Moisture at 100° C, 

 Total j)hosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosiihoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, , 



Per cent. 



26.75 

 5.44 

 2.00 

 2.57 

 1.08 

 2.95 

 3.90 

 1.69 



Valuation per two thousand pounds : — 



40.0 pounds of soluble phosphoric acid, 

 51.4 pounds of reverted phosphoric acid, 

 21.6 pounds of insoluble phosphoric acid, 

 69.0 pounds of potassium oxide, . 

 78.0 pounds of nitrogen, 



$24 61 



Cleveland Superphosphate. 



(Cleveland Dryer Co., Cleveland, 0. ; collected of Sheldon & Newcomb, Greenfield, 



Mass ) 



Guaranteed composition : Soluble phosphoric acid, 6 to 7 

 per cent. ; reverted phosphoric acid, 2 to 3 per cent. ; in- 

 soluble phosphoric acid, 2 to 3 per cent. ; potassium oxide, 

 3 to 4 per cent, (equivalent to potassium sulphate, 5.55 to 

 7.40 percent.); nitrogen, 2.05 to 2.85 percent, (equiva- 

 lent to ammonia, 2.5 to 3.5 per cent.). 



Per cent. 



Moisture at 100° C, 14.29 



Total phosphoric acid, 11.96 



Soluble phosphoric acid, 7.32 



Reverted phosphoric acid, 1-63 



Insoluble phosphoric acid, 3.01 



Potassium oxide, 3.23 



Nitrogen, 3.04 



Insoluble matter, 6-44 



