On the Reflection of Cathode Rays. 389 



reverse order to those of the first series, and P, the pressure given in 

 millionths of an atmosphere, was obtained by the McLeod gauge at the 

 commencement and end of each series. Deflections indicating a posi- 

 tive charge given to the Faraday cylinder are so marked ; all others 

 denote negative charges. 



Table III. 



Faraday cylinder fixed at 45. 



Eeadings taken with Reflector at different angles from 45 c to 180 . 



