COMMERCIAL FERTILIZERS. 



359 



Valuation per two thousand pounds : - 



49.80 pounds of soluble phosphoric acid, 

 106.4 pounds of reverted phosphoric acid, 

 93.6 pounds of insoluble phosphoric acid, 

 89. pounds of potassium oxide, . 

 68. pounds of nitrogen, 



629 21 



Pure Raio Bone Fertilizer. 

 (A. L. Ames, Peabody, Mass. ; collected at Danvers Asylum, Danyers, Mass.) 



Guaranteed composition : Available phosphoric acid, 8 to 

 11 per cent. ; ammonia, 2| to 3^ per cent, (equivalent to 

 nitrogen, 2 to 2.9 per cent.) ; potassium chloride, 4 to 6 per 

 cent. 



Per cent. 



16.58 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassivun oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



73. pounds of soluble phosphoric acid, 

 174. poimds of reverted phosphoric acid, 

 29.4 poimds of insoluble phosphoric acid, . 

 45.6 pounds of potassium oxide, . 

 61.4 pounds of nitrogen, .... 



13.82 

 3.65 

 8.70 

 1.47 

 2.28 

 3.07 

 .75 



$5 84 



13 05 



88 



1 94 



10 44 



$32 15 

 Bowker's Hill and Drill Phosphate. 



(Collected of Scott & Vietor, Lowell, Mass.) 

 Guaranteed composition: Total phosphoric acid, 11 to 13 

 per cent. ; soluble phosphoric acid, 8 to 10 per cent. ; re- 

 verted phosphoric acid, 1 to 2 per cent. ; potassium sulphate, 

 2 to 3 per cent. ; nitrogen, 2.5 to 3.5 per cent, (equivalent 

 to ammonia, 3 to 4 per cent.). 



Per cent. 



Moisture at 100° C, 16.05 



Total phosphoric acid, 11.91 



Soluble phosphoric acid, 7.20 



Reverted phosphoi-ic acid, 2.60 



Insoluble phosphoric acid, 2.11 



Potassium oxide, 1.12 



Nitrogen, 2.54 



Insoluble matter, 3.18 



