316 



BOARD OF AGRICULTURE. 



IV. ' 



Flour of Bones. 



(Messrs. Rafferty & Williams, New York; collected of Messrs. Garland, 

 Houghton, & Sears, Worcester, Mass.) 



Moisture at 100° C. 

 Organic and volatile matter 

 Ash constituents 

 Total nitrogen 

 Total phosphoric acid 

 Sand, &c. . . . 



Per cent. 



3.60 

 44.35 

 55.60 



3.44 



22.80 



.20 



V. 



Fine Bones. 



(Messrs. H. B. Arnold & Co., Boston ; collected of Messrs. Parker & Gan. 



nett, Boston, Mass.) 



Moisture at 100° C 



Organic and volatile matter 



Ash constituents 



Total nitrogen 



Total phosphoric acid 



Sand, &c. 



Per cent. 



10.80 

 25.06 

 74.94 

 1.62 

 27.37 

 .06 



The above samples of ground bones represent the ex- 

 tremes, in the composition of that article, found in our 

 markets : the amount of nitrogen differs from 1.62 per cent 

 to 4.5 per cent, and that of, the phosphoric acid from 22.1 

 per cent to 27.4 per cent. The same relation was noticed 

 in regard to their mechanical condition. No. IV. was of an 

 exceptionally fine condition, and No. III. was the coarsest 

 in the lot. The finest ground article with the highest per r 

 centage of nitrogen is usually the most valuable kind of fine 

 bones, provided the nitrogen noticed is due to the presence 

 of a liberal, amount of nitrogenous matter naturally dis- 

 tributed through the bones, and not to adhering flesh. 3.3 

 pounds of phosphoric acid are commercially considered equal 

 to one pound of nitrogen. 



Dissolved Bone-Black. 



(Bowker Fertilizer Co., Boston, Mass.) 



Moisture at 100° C. ..... 



Soluble phosphoric acid ..... 



Valuation per ton of two thousand pounds : 

 329.6 pounds of soluble phosphoric acid 



Per cent. 



14.08 

 16.48 



$39 56 



