COMMERCIAL FERTILIZEES. 



517 



Sparroio's High Grade Grass Fertilizer. 

 (Collected of G. W. Atkinson, Reading, Mass.) 



Guaranteed composition : Total phosphoric acid, 8 to 10 

 per cent. ; soluble and reverted phosphoric acid, 4 to 6 per 

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

 5^ per cent, (equivalent to nitrogen, 3.70 to 4.52 per 

 cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Solubl-e phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble jjhosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



15.65 

 11.46 

 2.91 

 4.12 

 4.43 

 4.31 

 5.02 

 2.52 



Valuation per two thousand pounds : — 



58.2 poimds of soluble phosphoric acid, 

 82.4 pounds of reverted phosphoric acid, 

 88.6 pounds of insoluble phosphoric acid, 

 86.2 pounds of potassium oxide, . 

 100.4 pounds of nitrogen. 



$34 73 



Dole's Perfect Lawn Dressing. 

 (Collected of M. A. Stone, Reading, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent. ; soluble and reverted phosphoric acid, 8 to 10 per 

 cent. ; potassium oxide, 4 to 5 per cent. ; nitrogen, 4 to 5 

 per cent. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



11.85 

 9.06 

 2.64 

 3.04 

 3.38 

 3.60 

 3.81 

 3.57 



