COIVOIERCIAL FERTILIZERS. 



537 



BHghtman & Co.'s Ground Bone. 

 (Collected of Pearse & Easterbrook, Fall River, Mass.) 



No guaranty obtained. 



Per ceut. 



Moisture at 100° C, 6.34 



Total phosphoric acid, 23.21 



Soluble phosphoric acid, none. 



Reverted phosphoric acid, 2.77 



Insoluble phosphoric acid, 20.44 



Nitrogen, 8.69 



Insoluble matter, 1.33 



Valuation per two thousand pounds : — 



55.4 pounds of reverted phosphoric acid, . . . f 4 16 



408.8 pounds of insoluble phosphoric acid, . . . 22 48 



73.8 pounds of nitrogen, 11 07 



$37 71 



Sargrave's Ground Bone. 

 (Hargrave's Manufacturing Company, Fall River, Mass. ; collected at mill.) 



Guaranteed composition : Total phosphoric acid, 18.80 

 per cent. ; soluble phosphoric acid, .51 per cent. ; reverted 

 phosphoric acid, 3.61 per cent. ; insoluble phosphoric acid, 

 14.67 per cent. ; nitrogen, 3.93 per cent, (equivalent to 

 ammonia, 4.77 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



1.8 pounds of soluble phosphoric acid, 

 98.8 pounds of reverted jihosphoric acid, . 

 367.2 pounds of insoluble phosphoric acid, . 

 55.2 pounds of nitrogen, .... 



Per cent. 



20.71 



23.39 



.09 



4.94 



18.36 



2.76 



1.11 



$0 14 



7 41 

 18 36 



8 28 



$34 19 



