NITROGEN IN DRIED BLOOD. 



321 



the manufacture of the Chili saltpetre, under the control 

 of the government, is quite satisfactorily managed. 



Nitrogen 

 Phosphoric acid 

 Total ash 

 ]\Ioisture 



Dried Blood. 



Per cent. 



I. 11. III. 



8.51 10.13 12.50 



2.56 10.00 12.50 



7.20 10.00 12.50 



37.34 12.90 20.00 



The dried blood serves almost exclusively as a nitrogen 

 source in compound fertilizers : it is for that purpose one of 

 the most valuable animal substances, on account of its rapid 

 formation of ammonia. The above analyses represent large- 

 ly the various qualities of dried blood used by our fertilizer 

 manufacturers. The price of these samples, according to 

 quality, has varied from forty to fifty dollars per ton. Most 

 of the blood of our large butcheries in the Eastern States is 

 worked up in the so-called " Animal Dust," which of later 

 years has acquired a deserved high reputation among our 

 home-made commercial fertilizers. Western cities supply 

 largely our markets with dried blood. 



Animal Dust. 

 I. 



Brighton Animal Dust. 

 (Messrs. Bowker & Co., Boston.) 



Volatile and organic animal matter 

 Ash constituents .... 

 INIoisture ..... 

 Phosphoric acid in ash . 

 Nitrogen in organic matter . 

 Insoluble matter .... 



Valuation per ton of two thousand pounds : — 



225.2 pounds of phosphoric acid . 

 136.8 pounds of nitrogen 



41 



Per cent. 

 71.00 

 28.90 

 11.50 

 11.26 

 6.84 

 .56 



$13.51 

 28.73 



$42.24 



