368 Scientific Proceedings^ Royal Dublin Society. 



It is shown that dii'ect contact of the tubers with partially blighted 

 foliage results in serious rot in storage. 



The blight does not spread from tuber to tuber even in moist pits to any 

 considerable extent, if at all. 



Soil contaminated by means of spores shed from the leaves continues 

 capable of inducing blight in freshly dug tubers which are brought into 

 contact with it over a period of at least ten days, and probably longer. 



The part played by contaminated soil is fully established by the results 

 obtained in laboratory investigations, which will be published separately. 



