242 
If this is the case, however, the silent discharge stream and the negative 
stream should have been deflected also. This might possibly be done with 
a stronger field. Also, the stream, if it consists of charged particles. should 
terminate on the opposite electrode, which is very seldom the ease. 
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. 
