298 



Board of agriculture. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide. 

 Nitrogen, 

 Insoluble matter, 



Valuation per two thousand pounds : — 



30.8 pounds of soluble phosphoric acid, 

 38.2 pounds of reverted phosphoric acid, 

 93.2 pounds of insoluble phosphoric acid, 

 121. pounds of potassium oxide, 

 72.2 pounds of nitrogen. 



Per cent. 



12 57 

 8.11 

 1.54 

 1.91 

 4.66 

 6.05 

 3.61 

 2.00 



$3 08 



3 44 



4 19 



5 14 

 14 44 



$30 29 



Bowkefs Fish and Potash. 

 (Collected of C. F. Brown, Northampton, Mass.) 



Guaranteed composition : Total phosphoric acid, 8 to 10 

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

 2\ to 3| per cent, (equivalent to ammonia, 3 to 41 per cent.). 



Moisture at 100° C, 

 Total phospho4-ic acid, . 

 Reverted phosphoric acid. 

 Soluble phosphoric acid. 

 Insoluble phosphoric acid. 

 Nitrogen, 

 Potassium oxide. 

 Insoluble matter, 



Valuation per two thousand pounds : — 



30.4 pounds of reverted phosphoric acid, 

 44.8 pounds of soluble phosphoric acid, 

 140.4 pounds of insoluble phosphoric acid, 

 41.4 pounds of nitrogen, 

 74.6 pounds of potassium oxide, . 



Per cent. 



10.65 

 10.78 

 1.62 

 2.24 

 7.02 

 2.07 

 3.73 

 7.20 



$2 74 

 4 48 

 6 32 

 8 28 

 3 17 



$24 90 



Fine Ground Bones. 

 (Bowker Fertilizer Company, Boston, Mass.) 



Guaranteed composition : Total phosphoric acid, 20 to 23 

 per cent. ; ammonia, 3 to 4 per cent, (equivalent to nitro- 

 gen, 2.5 to 3.3 per cent.). 



