358 



BOAED OF AGRICULTUKE. 



Valuation per two thousand pounds : — 



2.6 pounds of soluble phosphoric acid, 

 60.6 pounds of reverted phosphoric acid, 

 41. povmds of insoluble phosphoric acid, 

 89. pounds of potassium oxide, . 

 45.2 pounds of nitrogen, 



$0 21 

 4 55 

 1 23 



3 78 

 7 68 



$17 45 

 Dow's Nitrogenous Superphosphate. 

 (Collected of J. Stackpole & Sons, Ipswich, Mass.) 



Guaranteed composition : Available phosphoric acid, 8 to 

 10 per cent. ; muriate of potash, 3 to 4 per cent. ; ammonia, 

 2^ to d^ per cent, (equivalent to nitrogen, 2 to 2.9 per 

 cent.). 



Per cent. 



Moisture at 100° C, 18.42 



Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation jer two thousand pounds : — 



128. pounds of soluble phosphoric acid, 

 56.8 pounds of reverted phosphoric acid, 

 14.6 pounds j^ :i soluble phosphoric acid, 

 67.2 poimds of potassium oxide, . 

 54. pounds of nitrogen, 



9.97 

 6.40 

 2.84 

 .73 

 3.36 

 2.70 



$10 24 



4 26 



44 



2 86 



9 18 



$26 98 

 Darling's Animal Fertilizer. 

 (Collected of W. E. Livingston, Lowell, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent. ; potassium oxide, 4 to 6 per cent. ; ammonia, 4 to 

 6 per cent, (equivalent to nitrogen, 3.3 to 5 per cent.). 



Per cent. 



Moisture at 100° C, 12.54 



Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



12.49 

 2.49 

 5.32 



4.68 

 4.45 

 3.40 

 1.02 



