248 



BACTERIAL DISEASES OF PLANTS 



ments can be tried, i.e., effect on the gas of shaking, in the presence 

 of a strong solution of sodium hydroxid or potassium hydroxid. 

 Is part of it absorbed? Is the absorbed part, roughly, one-fifth? 

 Do not conclude too hastily. Allow time. Will the remainder 



Fig. ISS. — A. Effect of Bdcillus aroideae Townsend, on raw carrot, B. check 

 one-half. Time, 8 days. The left part was stirred up a little with a glass rod. 

 Inoculated in 19L5. 



explode when brought into contact with a flame? Is it hydro- 

 gen? From what media are acids produced? Can the organism 

 develop acid without gas (try glj^cerin) ? Is more than one 



