30 EXPERIMENT STATION. [Jan. 



of magnesia (being, of course, a part of the nitrogen set free as 

 ammonia), 1.87, which is equal to .GT pound of nitrogen. In 

 other words, less than 1 pound of nitrogen would be actually 

 saved from a ton of manure, which, of course, is of no prac- 

 tical account. It is probable, however, that much more nitro- 

 gen in different forms would be liberated than the amounts 

 secured in the above experiment, and that probably somewhat 

 more would be absorbed. 



Extensive investigations l)v German authorities indicate that 

 the value of the nitrogen saved by chemical absorbents is quite 

 out of proportion to the cost of the chemicals and the labor 

 involved. See the results of their investigations in the paper 

 following, entitled, " Chemical Methods for the Preservation of 

 Manure." 



