﻿392 
  Gooch 
  and 
  Kobayashi 
  — 
  Electrolytic 
  Analysis 
  

  

  of 
  asbestos 
  and 
  applying 
  suction. 
  The 
  filtering 
  tube 
  thus 
  

   made 
  may 
  be 
  dried, 
  or 
  even 
  ignited, 
  without 
  difficulty. 
  

  

  In 
  using 
  this 
  apparatus, 
  the 
  beaker, 
  both 
  electrodes, 
  and 
  the 
  

   filtering 
  tube 
  were 
  first 
  dried 
  and 
  weighed 
  together, 
  the 
  total 
  

   weight 
  amounting 
  to 
  about 
  20 
  grm. 
  The 
  material 
  for 
  analysis 
  

   was 
  electrolyzed 
  in 
  the 
  apparatus, 
  assembled 
  as 
  shown 
  in 
  fig. 
  3, 
  

   the 
  beaker 
  being 
  covered 
  with 
  a 
  split 
  watch-glass. 
  At 
  the 
  end 
  

  

  Fig. 
  3. 
  

  

  of 
  the 
  electrolysis 
  the 
  liquid 
  remaining 
  was 
  drawn 
  off 
  by 
  suc- 
  

   tion 
  through 
  the 
  filtering 
  tube, 
  and 
  the 
  washed 
  beaker, 
  elec- 
  

   trodes, 
  and 
  filtering 
  tube 
  were 
  dried 
  and 
  again 
  weighed 
  

   together. 
  

  

  With 
  this 
  apparatus, 
  determinations, 
  the 
  details 
  of 
  which 
  are 
  

   given 
  below, 
  were 
  made 
  of 
  copper 
  and 
  nickel 
  deposited 
  upon 
  

   the 
  rotating 
  cathode 
  from 
  sulphate 
  solutions, 
  and 
  of 
  lead 
  

   dioxide, 
  deposited 
  upon 
  the 
  rotating 
  electrode 
  used 
  as 
  the 
  

   anode, 
  from 
  a 
  solution 
  of 
  lead 
  nitrate. 
  

  

  The 
  Determination 
  of 
  Copper. 
  

  

  In 
  the 
  determinations 
  of 
  copper 
  the 
  material 
  used 
  was 
  

   recrystallized 
  copper 
  sulphate, 
  CnS0 
  4 
  .5H 
  2 
  0, 
  and 
  a 
  separately 
  

   weighed 
  portion 
  (0*5 
  grm., 
  as 
  nearly 
  as 
  might 
  be) 
  was 
  taken 
  

   for 
  each 
  analysis. 
  In 
  each 
  case 
  the 
  electrolysis 
  was 
  continued 
  

  

  