﻿652 
  Dr. 
  F. 
  C. 
  Brown 
  on 
  the 
  Kinetic 
  Energy 
  of 
  the 
  

  

  made 
  air-tight 
  by 
  sealing-wax 
  covered 
  over 
  on 
  the 
  outside 
  

   by 
  soft 
  wax. 
  On 
  the 
  bottom 
  o£ 
  the 
  rod 
  was 
  threaded 
  a 
  brass 
  

   disk, 
  h, 
  to 
  which 
  was 
  soldered 
  a 
  platinum 
  disk 
  o£ 
  the 
  same 
  

   diameter. 
  The 
  guard-ring 
  G 
  was 
  fastened 
  to 
  the 
  bottom 
  of 
  

   the 
  brass 
  tubing, 
  as 
  shown 
  in 
  the 
  diagram. 
  It 
  was 
  an 
  easy 
  

   matter 
  to 
  clean 
  the 
  platinum 
  disk 
  on 
  this 
  upper 
  plate 
  before 
  

   any 
  series 
  of 
  observations, 
  and 
  thereby 
  avoid 
  any 
  complica- 
  

   tions 
  that 
  might 
  be 
  due 
  to 
  the 
  high 
  potential 
  effect. 
  The 
  

   nature 
  of 
  this 
  effect 
  will 
  be 
  explained 
  further 
  on 
  in 
  the 
  paper. 
  

  

  Fig. 
  1. 
  

  

  Pomp 
  

  

  The 
  guard-ring 
  arrangement 
  made 
  it 
  impossible 
  for 
  any 
  

   collected 
  charges 
  on 
  the 
  glass 
  to 
  leak 
  to 
  the 
  upper 
  plate 
  or 
  

   its 
  electrical 
  connexions. 
  

  

  The 
  hot 
  body 
  H 
  and 
  the 
  surrounding 
  disk, 
  c, 
  were 
  held 
  in 
  

  

  