242 



If this is the case, however, the silent discharge stream and the negative 

 stream should have been deflected also. This might possibly be clone with 

 a stronger field. Also, the stream, if it consists of charged particles, should 

 terminate on the opposite electrode, which is very seldom the case. 



The above investigation was suggested by Professor Arthur L. Foley 

 of Indiana University. I wish to thank him and Professor R, R. Ramsey 

 for their helpful suggestions during the course of the investigation. 



Physics Laboratory of Indiana University. 

 Bloomington, Ind. 



