362 Mr Southerns, Experimental Investigation as to Dependence 

 B. Taken at 1 minute intervals. Reversed at | minutes. 



C. Smaller electrostatic deflection, zero for no field 120'0 about: 



D. 



Cut out and earthed balance, and moved over reversing 

 key several times. No change of zero. 



3. June 12th. 



A. Taken at 1 minute intervals. Zero about 63'0. 



