COMMERCIAL FERTILIZERS. 



543 



Crocker's Ammomated Bone Superphosphate. 

 (Collected of S. P. Bliss, Taunton, Mass.) 



Guaranteed composition : 'Soluble phosphoric acid, 6 to 8 

 per cent. ; reverted phosphoric acid, 2 to 4 per cent. ; in- 

 soluble phosphoric acid, 1 to 2 per cent. ; potassium sul- 

 phate, 1 to 3 per cent. ; ammonia, 2.5 to 4.5 per cent, 

 (equivalent to nitrogen, 2.9 to 3.7 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosjjhoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



11.04 

 11.22 

 7.69 

 2.13 

 1.40 

 1.77 

 2.92 

 4.66 



Valuation per two thousand pounds ; — 



153.8 pounds of soluble j^hosphoric acid, 

 42.6 potmds of reverted phosphoric acid, 

 28.0 povmds of insoluble phosphoric acid, 

 35.4 pounds of potassiima oxide, . 

 68.4 pounds of nitrogen. 



$28 51 



Brightman & Co.'s Fish and Potash. 

 (Collected of P. R. Atwood, Plymouth, Mass.) 



Guaranteed composition : Total bone phosphate of lime, 

 15 to 18 per cent. ; soluble phosphoric acid, 2 to 3 per cent. ; 

 insoluble phosphoric acid, .40 per cent. ; potassium oxide, 

 2 to 3 per cent. ; ammonia, 3 to 5 per cent, (equivalent to 

 nitrogen, 2.5 to 4.1 per cent.). 



Per cent. 



Moisture at 100° C, 25.84 



Total phosphoric acid, 6.33 



Soluble i^hosphoric acid, 1.34 



Reverted phosphoric acid, 2.13 



Insoluble phosphoric acid, 1-86 



Potassium oxide, ■ 8.13 



Nitrogen, 2.88 



Insoluble matter, 10.60 



