76 



THE CONNECTICUT AGRICULTURAL 



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

 salt or 15.6 per cent, of nitrogen. 



Commercial mnriate of potash usually has 80 per cent, of the 

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



If quoted at 2.00 cts. per lb. Actual potash costs 3.96 cts. per lb. 



The following table shows the fluctuations in the wholesale 

 prices of a number of fertilizing materials in the New York 

 market, during the last 27 months. The price given for each 

 month is the average of the four weekly quotations in that month. 

 Sulphate of ammonia is assumed to contain 20.5 per cent, and 

 nitrate of soda 15.6 per cent, nitrogen, and muriate of potash oOh 

 per cent, of actual potash or 80 per cent, of the pure salt. For 

 three months azotin and ammonite were not quoted at all. 



