﻿444 
  

  

  Mr. 
  A. 
  P. 
  Wills 
  on 
  the 
  Susceptibility 
  of 
  

  

  It 
  should 
  be 
  noticed 
  that 
  the 
  coefficient 
  of 
  susceptibility 
  for 
  

   tin 
  is 
  positive, 
  that 
  is, 
  the 
  present 
  experiments 
  would 
  seem 
  to 
  

   indicate 
  that 
  tin 
  is 
  magnetic. 
  Now 
  previous 
  experiments 
  upon 
  

   tin 
  have 
  clearly 
  shown 
  it 
  to 
  be 
  diamagnetic, 
  and 
  the 
  conclusion 
  

   to 
  be 
  drawn 
  in 
  the 
  present 
  case 
  is 
  that 
  the 
  sample 
  used 
  must 
  

   have 
  contained 
  traces 
  of 
  iron. 
  The 
  glass 
  used 
  was 
  a 
  piece 
  of 
  

   fine 
  optical 
  glass. 
  The 
  value 
  of 
  tc 
  obtained 
  for 
  this 
  piece 
  of 
  glass 
  

   is 
  four 
  or 
  five 
  times 
  the 
  value 
  usually 
  given. 
  Aluminium 
  is 
  

   seen 
  to 
  have 
  a 
  positive 
  value 
  of 
  k 
  and 
  quite 
  large. 
  

  

  Table 
  III. 
  

  

  Antimony 
  ... 
  \ 
  

  

  Bismuth 
  

  

  Sulphur 
  

  

  Ebonite 
  

  

  Paraffin 
  \ 
  

  

  White 
  Wax 
  . 
  

   Shellac 
  

  

  Pi 
  

  

  173 
  3254 
  

   173-3320 
  

  

  202-5290 
  

   202-5970 
  

  

  96-3017 
  

   93-2963 
  

  

  80-9105 
  

   809232 
  

  

  64-4940 
  

   64-5054 
  

  

  63-7308 
  

   63-7298 
  

  

  74-1848 
  

   74-2178 
  

  

  Mean 
  

  

  Po- 
  

  

  173-3287 
  

  

  202-5630 
  

  

  173-3830 
  

  

  203-3932 
  

  

  96-2990 
  96-3817 
  

  

  80-9168 
  80-7964 
  

  

  64-4997 
  

   63-7303 
  

   74-2013 
  

  

  64-54S0 
  

   637811 
  

   74-2422 
  

  

  p= 
  

  

  

  

  

  -Pi-t-e- 
  

  

  w. 
  

  

  t. 
  

  

  fcXlO 
  6 
  . 
  

  

  •0553 
  

  

  4-55 
  

  

  •495 
  

  

  - 
  714 
  

  

  •8312 
  

  

  4-58 
  

  

  •430 
  

  

  -12-25 
  

  

  •0837 
  

  

  4-94 
  

  

  •644 
  

  

  - 
  -765 
  

  

  1194 
  

  

  4-94 
  

  

  •648 
  

  

  4- 
  1-08 
  

  

  •0493 
  

  

  4-44 
  

  

  •559 
  

  

  - 
  -577 
  

  

  •0518 
  

  

  4-94 
  

  

  •544 
  

  

  - 
  -560 
  

  

  0419 
  

  

  503 
  

  

  •615 
  

  

  - 
  -394 
  

  

  ! 
  

  

  iV- 
  Po- 
  

  

  74-6347 
  730140 
  

  

  e 
  = 
  -0010 
  

   £=•0026 
  

  

  F= 
  

  

  Pi'-Po' 
  + 
  °- 
  

   1-623 
  

  

  £=4-54 
  

   1= 
  -427 
  

  

  H. 
  

  

  6,740 
  

  

  The 
  bismuth 
  used 
  in 
  this 
  series 
  was 
  furnished 
  by 
  Eimer 
  

   and 
  Amend, 
  of 
  New 
  York, 
  and 
  was 
  supposed 
  to 
  be 
  chemically 
  

   pure. 
  The 
  results 
  for 
  antimony 
  seem 
  to 
  show 
  that 
  the 
  sample 
  

   used 
  must 
  have 
  contained 
  just 
  a 
  trace 
  of 
  iron, 
  since 
  the 
  value 
  

   found 
  for 
  /e, 
  while 
  negative, 
  is 
  much 
  smaller 
  than 
  that 
  usually 
  

   given. 
  

  

  Table 
  IV. 
  gives 
  the 
  results 
  found 
  for 
  several 
  kinds 
  of 
  wood. 
  

  

  