COMIMERCIAL FERTILIZERS. 



541 



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 : 



218.2 pounds of soluble phosphoric acid, 

 33.8 pounds of rereriied phosphoric acid, 

 2.4 pounds of insoluble phosjihoric acid, 

 57.4 poimds of potassium oxide, . 

 63.0 pounds of nitrogen, 



Per cent. 



16. 3G 



12.72 



10.91 



1.69 



.12 



2.87 



3.15 



1.09 



?17 46 



2 54 



07 



2 44 



11 03 



?33 54 



Brightman & Co.'s Dry Ground Menhaden Fish Guano. 

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



Guaranteed composition : Total bone phosphate of lime, 

 15 to 20 per cent. ; ammonia, 10 to 12 per cent, (equiva- 

 lent to nitrogen, 7.88 to 8.24 per cent.). 



Per cent. 



Moisture at 100° C, 10.72 



Total phosphoric acid, 7.95 



Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



9.2 poimds of soluble phosphoric acid, 

 70.6 poimds of reverted johosphoric acid, . 

 79.2 pounds of insoluble phosphoric acid, . 

 168.2 pounds of nitrogen, .... 



$39 44 



Maya's Superphosphate. 

 (Collected of P. Williams & Co., Taunton, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 9 to 

 11 per cent. ; available phosphoric acid, 10.5 to 11.5 per 

 cent. ; insoluble phosphoric acid, 1 to 2 per cent. ; potas- 



