﻿546 
  Prof. 
  D. 
  K 
  Mallik 
  on 
  Magnetic 
  

  

  At 
  lower 
  pressures 
  ^ 
  decreases 
  as 
  p 
  decreases. 
  Thus 
  

  

  P. 
  T. 
  |. 
  

  

  26-5 
  8 
  33 
  

  

  19 
  7 
  27 
  

  

  Nitrous 
  oxide 
  (N 
  2 
  0). 
  

  

  The 
  discharge 
  passes 
  at 
  a 
  higher 
  pressure 
  than 
  in 
  air. 
  

  

  The 
  rotation 
  begins 
  above 
  a 
  pressure 
  of 
  10*4 
  cm. 
  ; 
  the 
  

   relation 
  between 
  pressure 
  and 
  the 
  corresponding 
  period 
  of 
  

   rotation 
  is 
  similar 
  to 
  that 
  in 
  air. 
  

  

  p. 
  

  

  T. 
  

  

  P 
  

  

  T 
  

  

  62 
  

  

  2-4 
  

  

  25-8 
  

  

  39 
  

  

  1-6 
  

  

  24-4 
  

  

  33-6 
  

  

  1-37 
  

  

  24-5 
  

  

  23-58 
  

  

  1 
  

  

  23*5 
  

  

  14-82 
  

  

  •6 
  

   Mean 
  

  

  24-7 
  

  

  

  . 
  24-6 
  

  

  

  5-41-5, 
  

  

  

  Since 
  in 
  air 
  

  

  ^ 
  varies 
  inversely 
  as 
  the 
  density, 
  very 
  nearly. 
  

  

  The 
  curve 
  connecting 
  pressure 
  and 
  potential- 
  difference 
  

   between 
  the 
  electrodes 
  is 
  of 
  the 
  same 
  type 
  as 
  that 
  for 
  air, 
  

   being 
  situated 
  further 
  from 
  the 
  ^>-axis 
  than 
  the 
  latter. 
  

  

  Carbonic 
  acid 
  (C0 
  2 
  ). 
  

  

  The 
  discharge 
  passes 
  at 
  a 
  very 
  high 
  pressure, 
  the 
  band 
  

   discharge 
  appearing 
  at 
  a 
  pressure 
  above 
  that 
  of 
  15 
  cm. 
  

  

  pco 
  is 
  not 
  constant, 
  but 
  increases 
  with 
  pressure 
  as 
  is 
  shown 
  

   below. 
  

  

  (in 
  millimetres 
  

   of 
  mercury). 
  

  

  125-5 
  

  

  T 
  

  

  (in 
  seconds). 
  

  

  1-8 
  

  

  P 
  

  

  T 
  

  

  70 
  

  

  102 
  

  

  1-7 
  

  

  60 
  

  

  75 
  

  

  1-4 
  

  

  53-5 
  

  

  42 
  

  

  1-07 
  

  

  40 
  

  

  32 
  

  

  •84 
  

  

  38 
  

  

  23-5 
  

  

  •7 
  

  

  33-5 
  

  

  15 
  

  

  •55 
  

  

  27-3 
  

  

  