528 



BOARD OF AGRICULTURE. 



The material serves for the manufacture of high grades of 

 "formula fertilizers." The amount of sulphuric acid present 

 in either sample did not exceed 3.5 per cent. This fact shows 

 that the product is obtained by a different process than our 

 ordinary superphosphates ; it is most likely the isolated soluble 

 portion of the latter evaporated after its separation from the 

 insoluble sulphate of lime, etc. 



Flamingo Guano. 



[Sent on from Worcester, Mass.] 



Moisture at 100° C, . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoi'ic acid, 

 Potassium oxide, 

 Nitrogen, . . . . 

 Insoluble matter. 



Per cent. 



17.20 

 16.16 

 0.48 

 6.22 

 10.46 

 0.31 

 0.80 

 2.95 



Valuation per 2,000 lbs.. 



$17 86 



Dissolved Bonehlack. 

 [Sent on from South Deerfield, Mass.] 



Moisture at 100 C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Insoluble matter, 



Valuation per 2,000 lbs.. 



Per oent. 



20.43 



16.14 



15.81 



0.18 



0.15 



0.94 



125 64 



The article is a fair representative of its kind ; its moisture 

 is rather more than usual. 



