26 Studies in Bacteriosis 



Summary. 



1. The production by the cells of Protea cynaro'ides of a bacteriolysin 

 against the organism which produces a leaf-spot disease, suggested in a 

 former paper, has not been confirmed. 



2. The bacteria enter the leaf by way of the stomata; the local 

 lesions produced are prevented from spreading by the development of 

 wound cork. 



3. The causal organism succumbs very readily to the desiccation to 

 which it is subjected owing to the cells which it attacks being cut off by 

 the wound cork from their water supply. 



(Received February 21.9/, 1921.) 



