S. G. Paine 



209 



Infection Experiments. 



Numerous infection experiments have been made upon young mush- 

 rooms growing in the beds at Brentford and upon mushrooms removed 

 from the bed and kept in fresh condition with their stalks embedded in 

 moist soil covered with bell-jars. A suspension in sterilised mushroom- 



^?^^. 









^^^■sm 



100m 

 Fig. 3. Camera drawing from a 3,u radial section through the cap of a diseased mushroom, 

 showing complete disorganisation of the outer hyphae and penetration of the tissue 

 by bacteria to a depth of not 'more than half a millimetre. 











50, 



Fig. 4. Camera drawing from same section as Fig. 3, showing hyphae 

 penetrated by bacteria. 



