GO EXrEULMENT STATION. [Jan. 



were used in each test, and after being treated for these differ- 

 ent periods they were removed from the bell. jars and placed 

 under greenhouse conditions to await the results of treatment. 

 Y\'hcn these cuttings were compared with untreated or normal 

 plants, as they were in all cases, a slight acceleration was found 

 in the development of all plants subject to gas for twenty-four, 

 forty-eight and seventy-two hours, although the gain was not 

 marked. 



