EXPERIMENT STATION. 



Y5 



is a usage of the trade to reckon all nitrogen, in whatever form it 

 occurs, as ammonia. 



To facilitate finding the actual cost of nitrogen per pound from 

 the cost per unit of ammonia in the market reports, the following 

 table is given : 



Ammonia at $4.00 per unit is equivalent to nitrogen at 24.3 cts. 

 " 3.90 " " " 



" 3.80 " 



" 3.70 " " " 



" 3.60 " " " 



3.50. " " " 



" 3.40 " " " 



" 3.30 " " " 



3.20 " " " 



" 3 10 " " " 



" 3.C0 " " " 



a 2.90 " " " 



" 2.80 " " 



" 2.70 " " ■' 



" 2.60 " '• " 



2.50 • ■' . 

 " 2.40 i; ' ' 



2.30 " 

 " 2.20 ■ " " '■ 



,; 2.10 " " '■ 



" 2.00' " " " 



Commercial sulphate of ammonia contains on the average 20.5 

 per cent, of nitrogen, though it is found to vary considerably in 

 quality. When it has that amount of nitrogen (equivalent to 

 24.3 per cent, of ammonia), 



At 5 cents per lb. Nitrogen costs 24.4 cents per lb. 



" " 23.7 " 



" ■' 23.1 " 



" " 22.5 " 



" •' 21.9 '• 



" •' 21.3 " 



" '* 20.7 " 



" " 20.] " 



" " 19.5 " 



" " 18.9 •' 



" 18.3 " 



" '■ 17.6 " 



" '^ 17.0 



" " 16.4 " 



" " 15.8 



" " 15.2 " 



" " 14.6 



