﻿876 
  

  

  Mr. 
  B. 
  TV. 
  Clack 
  on 
  th 
  

  

  le 
  

  

  as 
  the 
  salt 
  diffuses 
  out, 
  these 
  very 
  dilute 
  solutions 
  are 
  not 
  

   produced 
  in 
  this 
  method. 
  

  

  Since 
  no 
  experiments 
  were 
  made 
  by 
  Kohlrausch 
  with 
  

   solutions 
  as 
  dilute 
  as 
  those 
  produced 
  by 
  the 
  diffusion 
  of 
  the 
  

   salt 
  into 
  the 
  suspended 
  apparatus 
  in 
  Method 
  A, 
  it 
  was 
  necessary 
  

   to 
  make 
  a 
  special 
  series 
  of 
  experiments 
  to 
  determine 
  the 
  value 
  

   of 
  8. 
  Moreover, 
  as 
  the 
  solutions 
  wore 
  so 
  dilute, 
  it 
  was 
  thought 
  

   advisable 
  to 
  use 
  a 
  larger 
  flask 
  than 
  than 
  that 
  employed 
  by 
  

   Kohlrausch. 
  In 
  place 
  then 
  of 
  his 
  flask 
  oi' 
  a 
  I 
  tout 
  130 
  e.c. 
  

   capacity, 
  one 
  was 
  taken 
  having 
  a 
  volume 
  of 
  about 
  300 
  c.c. 
  

   ami 
  it 
  was 
  loaded 
  with 
  shot, 
  so 
  as 
  to 
  weigh 
  about 
  1 
  gins, 
  when 
  

   immersed 
  in 
  water. 
  The 
  neck 
  was 
  drawn 
  off 
  and 
  sealed 
  up 
  

   in 
  the 
  blowpipe, 
  and 
  the 
  flask 
  was 
  then 
  suspended 
  by 
  moans 
  

   o£ 
  a 
  pair 
  of 
  fibres 
  of 
  anspun 
  silk 
  attached 
  to 
  the 
  pan 
  of 
  the 
  

   balance, 
  in 
  distillod 
  water 
  cooled 
  to 
  (> 
  I 
  '. 
  

  

  It 
  is 
  very 
  accessary 
  that 
  the 
  fibres 
  should 
  be 
  thoroughly 
  

  

  wetted 
  before 
  QSC 
  They 
  must 
  also 
  be 
  smooth, 
  and 
  dust 
  

  

  should 
  1 
  e 
  removed 
  as 
  far 
  a- 
  possible 
  from 
  the 
  water, 
  other- 
  

   wise 
  the 
  balance-beam 
  refuses 
  to 
  swing, 
  or 
  only 
  swings 
  in 
  a 
  

   very 
  erratic 
  manner. 
  

  

  \\ 
  ben 
  the 
  flask 
  has 
  been 
  weighed 
  in 
  distilled 
  writer 
  at 
  0° 
  C. 
  

   it 
  i- 
  clamped 
  by 
  means 
  of 
  a 
  suitable 
  device, 
  and 
  a 
  standardized 
  

   solution 
  of 
  tbe 
  -alt 
  i- 
  added 
  to 
  the 
  distilled 
  water 
  (over 
  

   ('» 
  litre-) 
  l(i 
  c.c. 
  at 
  a 
  time. 
  .V 
  Beries 
  of 
  very 
  dilute 
  solutions 
  

   of 
  known 
  strength 
  are 
  thus 
  obtained, 
  and 
  the 
  corresponding 
  

   density 
  may 
  be 
  found, 
  from 
  which 
  the 
  value 
  of 
  8 
  easily 
  

   follows. 
  

  

  NaOL 
  

  

  KOI. 
  

  

  KX0 
  3 
  . 
  

  

  Concentration. 
  c\ 
  

  

  Concent. 
  d. 
  

  

  Concent. 
  

  

  S. 
  

  

  •0008453 
  

   •0012G5 
  

   16S4 
  

   2102 
  

   2516 
  

   2931 
  

   3343 
  

   3754 
  

  

  •2152 
  

  

  •2252 
  

   •22S1 
  

   •230S 
  

   •2329 
  

   •2354 
  

   •23H3 
  

  

  •0004153 
  

   •0008290 
  

   •001241 
  

   1652 
  

   2061 
  

   2469 
  

   2875 
  

   3280 
  

  

  •3054 
  

   •3072 
  

   •3079 
  

   •3074 
  

   •3089 
  

   •3091 
  

   •3094 
  

   •3095 
  

  

  •000414G 
  

  

  •0006211 
  

  

  •0008267 
  

  

  •001032 
  

  

  1440 
  

  

  2047 
  

  

  2449 
  

  

  3046 
  

  

  •3097 
  

   •3072 
  

   •30C1 
  

   •3042 
  

   •3038 
  

   •3037 
  

   •3052 
  

   •3061 
  

  

  It 
  might 
  be 
  mentioned 
  that 
  a 
  comparison 
  of 
  the 
  weighings 
  

   from 
  which 
  the 
  above 
  figures 
  were 
  obtained 
  with 
  the 
  earlier 
  

   ones 
  mentioned 
  in 
  § 
  4, 
  using 
  a 
  wire 
  suspension, 
  sho\\ 
  r 
  that 
  

   they 
  are 
  apparently 
  equally 
  consistent 
  and 
  trustworthy. 
  It 
  

  

  