J. OLDS AND M. E. OLDS 187 



alternated. Another thing has happened, we seemed to be reinforcing a slow wave 

 and a unit, and then we moved the electrode and then we found that now for 

 perhaps a milhmetre we could not get rid of the slow wave, and other units firing 

 on it; this should have been mentioned in connection with Dr Magoun's earlier 

 question. 



