EXPEEIMENT STATION. 



59 



At 5i cents per lb. Nitrogen costs 27.5 cents per lb. 



Commercial nitrate of soda averages 95 per cent, of the pure 

 salt or 15.6 per cent, of nitrogen. 



If quoted at 3| cents per lb. Nitrogen costs 23.2 cents per lb. 

 " 3^ " " " 22.3 



(1 

 tl 



21.5 

 20.8 

 19.9 

 19.2 

 18.3 

 17.6 

 16.9 

 16.0 



Commercial mni'iate of potash usually has 80 per cent, of the 

 pure salt, or 50^ per cent, of actual potash. 



If quoted at 2.25 cts. per lb. Acti: 



