826 



BOARD OF AGRICULTURE. 



This convenient and valuable form of nitrogen is largely 

 used for the preparation of concentrated fertilizers according 

 to prescribed formulae for specified crops. 



Dry blood of the above-stated high quality has been sold 

 at fifty dollars per ton, or twenty cents per pound of nitrogen. 



Ground Horn and Hoof. 



(Sent on for examination.) 



Moisture lost at 100° C. . 

 Organic and volatile matter 

 Ash constituents 

 Total nitrogen 

 Total phosphoric acid 

 Insoluble matter 



Per cent. 

 10.08 

 85.38 

 14.62 

 11.84 

 2.30 

 .24 



The substance was in an excellent mechanical condition, 

 and evidently in a good state of disintegration for speedy 

 action. This condition is brought about, as I have stated 

 already on a previous occasion, by subjecting the crude ma- 

 terial for some time to high pressed steam, and subsequent 

 rapid and thorough drying at somewhat above 100° C. 



Wool- Waste. 

 (Sent on for examination.) 



Moisture lost at 100° C. 



Nitrogen 



Per cent. 



10.12 

 5.10 



The material tested had been exposed for nearly one year 

 to the unrestricted influence of the weather, with apparently 

 but little effect : its low percentage of nitrogen is due to 

 foreign admixture, as sweepings, &c. The agricultural value 



