88 



ROYAL SOCIIOTY OF (UN A DA 



when tlie pressure was reduced still further the charging action was 

 reversed and for lower pressures the free system more and more rapidly 



TABLE II. 



Pressure 

 mm . 



Deflection in mm. 

 on scale 



gained a positive charge. In this experiment the volta effect would make 

 the aluminium positive to the outside bras? cylinder and consequently 



