COMMERCIAL FERTILIZERS. 



241 



Per cent. 



Insoluble phosphoric acid, 2.13 



Potassium oxide, 8.71 



Nitrogen, .... 5.06 



Insoluble matter 4.70 



Valuation per two thousand pounds : — 



101.8 pounds of soluble phosphoric acid, 



12.8 pounds of reverted phosphoric acid, 



42.6 pounds of insoluble phosphoric acid, 



74.2 pounds of potassium oxide, . 

 101.2 pounds of nitrogen, . . . 



$41 21 

 Bone Phosphate. 

 (A. L. Ames, Peabody, Mass. ; collected by Chemist of Station.) 



No guarantee obtained. 



Moisture at 100° C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen, .... 

 Insoluble matter, 



Per cent, 



12.38 



16.41 



4.60 



7.38 



4.43 



.75 



2.75 



.73 



Valuation per two thousand pounds : ■ 



92. pounds of soluble phosphoric acid, 

 147.6 pounds of reverted phosphoric acid, 

 88.6 pounds of insoluble phosphoric acid, 

 15. pounds of potassium oxide, . 

 55. pounds of nitrogen, 



ClarK's Cove Guano. 



$10 12 



11 81 

 6 32 



64 



12 65 



$40 54 



(Clark's Cove Guano Co., New Bedford, Mass. ; collected of E. S. Snow, Belcher- 

 town, Mass.) 



No guarantee obtained. 



Moisture at, 100° C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 



Per cent. 



22.95 



8.38 



6.39 



.07 



