﻿716 
  Prof. 
  Gr. 
  N. 
  Lewis 
  : 
  A 
  Revision 
  of 
  the 
  

  

  Between 
  these 
  two 
  limits 
  it 
  is 
  obvious 
  that 
  

  

  Jmv 
  2 
  < 
  E 
  ; 
  < 
  mv 
  2 
  . 
  

   The 
  momentum 
  and 
  the 
  kinetic 
  energy 
  o£ 
  any 
  mass 
  moving 
  

   with 
  the 
  velocity 
  of 
  light 
  are, 
  therefore, 
  

  

  M=mV, 
  

  

  E' 
  = 
  mV 
  2 
  , 
  

   but 
  these 
  equations 
  are 
  identical 
  with 
  (5) 
  and 
  (9) 
  which 
  we 
  

   obtained 
  for 
  the 
  momentum 
  and 
  the 
  energy 
  of 
  a 
  beam 
  of 
  light. 
  

  

  Further 
  Consequences 
  of 
  the 
  Theory. 
  

  

  The 
  view 
  here 
  proposed, 
  which 
  appears 
  at 
  first 
  sight 
  a 
  

   reversion 
  to 
  the 
  old 
  corpuscular 
  theory 
  of 
  light, 
  must 
  seem 
  

   to 
  many 
  incompatible 
  with 
  the 
  electromagnetic 
  theory. 
  Tf 
  

   it 
  were 
  really 
  so 
  I 
  should 
  not 
  have 
  ventured 
  to 
  advance 
  it, 
  

   for 
  the 
  ideas 
  announced 
  by 
  Maxwell 
  constitute 
  what 
  may 
  no 
  

   longer 
  be 
  regarded 
  as 
  a 
  theory, 
  but 
  rather 
  a 
  body 
  of 
  experi- 
  

   mental 
  fact. 
  The 
  new 
  theory 
  is 
  offered, 
  not 
  in 
  any 
  sense 
  to 
  

   replace, 
  but 
  to 
  supplement 
  the 
  accepted 
  theories 
  of 
  light. 
  I 
  

   hope 
  in 
  another 
  paper 
  to 
  show 
  that 
  it 
  is 
  entirely 
  consistent 
  

   with 
  those 
  theories. 
  Such 
  a 
  proof 
  may 
  constitute 
  a 
  step 
  

   towards 
  one 
  of 
  the 
  obvious 
  goals 
  of 
  present 
  day 
  science, 
  the 
  

   complete 
  mechanical 
  explanation 
  of 
  electromagnetic 
  pheno- 
  

   mena, 
  or, 
  what 
  is 
  very 
  nearly 
  the 
  same 
  thing, 
  an 
  electromag- 
  

   netic 
  explanation 
  of 
  the 
  phenomena 
  of 
  ordinary 
  mechanics. 
  

   In 
  the 
  meantime 
  a 
  few 
  of 
  the 
  more 
  salient 
  conclusions 
  of 
  our 
  

   theory 
  may 
  be 
  cursorily 
  examined. 
  

  

  In 
  the 
  first 
  place 
  it 
  should 
  be 
  noticed 
  that, 
  while 
  the 
  

   theory 
  is 
  consistent 
  with 
  a 
  modified 
  corpuscular 
  theory 
  of 
  

   light, 
  it 
  does 
  not 
  necessarily 
  imply 
  that 
  light 
  is 
  corpuscular. 
  

   The 
  stream 
  of 
  mass 
  issuing 
  from 
  a 
  radiating 
  body 
  may 
  be 
  

   made 
  up 
  of 
  discrete 
  particles 
  or 
  it 
  may 
  be 
  continuous. 
  

   Whatever 
  it 
  may 
  be 
  that 
  is 
  emitted 
  it 
  is 
  not 
  matter 
  in 
  the 
  

   ordinary 
  sense, 
  as 
  is 
  to 
  be 
  seen 
  from 
  the 
  following 
  con- 
  

   siderations 
  : 
  — 
  

  

  According 
  to 
  equation 
  (15) 
  any 
  body 
  of 
  finite 
  mass 
  

   increases 
  in 
  mass 
  as 
  it 
  increases 
  in 
  velocity 
  and 
  would 
  possess 
  

   infinite 
  mass 
  if 
  it 
  could 
  be 
  given 
  the 
  velocity 
  of 
  light. 
  

   Therefore 
  that 
  which 
  in 
  a 
  beam 
  of 
  light 
  has 
  mass, 
  momentum, 
  

   and 
  energy, 
  and 
  is 
  travelling 
  with 
  the 
  velocity 
  of 
  light, 
  would 
  

   have 
  no 
  energy, 
  momentum, 
  or 
  mass 
  if 
  it 
  were 
  at 
  rest, 
  or 
  indeed 
  

   if 
  it 
  were 
  moving 
  with 
  a 
  velocity 
  even 
  by 
  the 
  smallest 
  fraction 
  less 
  

   than 
  that 
  of 
  light. 
  After 
  this 
  extraordinary 
  conclusion 
  it 
  would 
  

   be 
  at 
  present 
  idle 
  to 
  discuss 
  whether 
  the 
  same 
  substance 
  or 
  

   thing 
  which 
  carries 
  the 
  radiation 
  from 
  the 
  emitting 
  body 
  

   continues 
  to 
  carry 
  it 
  through 
  space, 
  or, 
  indeed, 
  whether 
  there 
  

   is 
  any 
  substance 
  or 
  thing 
  connected 
  with 
  the 
  process. 
  

  

  