﻿Chemistry 
  and 
  Physics. 
  293 
  

  

  and 
  argon, 
  and 
  of 
  this 
  the 
  39 
  cc, 
  argon 
  would 
  be 
  1*93 
  per 
  cent. 
  

   Since, 
  according 
  to 
  Kellas 
  (Proc. 
  Roy. 
  Soc, 
  vol. 
  lix, 
  p. 
  67, 
  1895), 
  

   100 
  cc 
  of 
  mixed 
  atmospheric 
  nitrogen 
  and 
  argon 
  contains 
  1*19 
  per 
  

   cent 
  of 
  argon, 
  we 
  see 
  that 
  in 
  the 
  diffused 
  gas 
  the 
  proportion 
  of 
  

   argon 
  is 
  about 
  half 
  as 
  great 
  again 
  as 
  in 
  the 
  atmosphere. 
  Argon 
  

   then 
  passes 
  the 
  india-rubber 
  film 
  more 
  readily 
  than 
  nitrogen, 
  but 
  

   not 
  in 
  such 
  a 
  degree 
  as 
  to 
  render 
  the 
  diffusion 
  process 
  a 
  useful 
  one 
  

   for 
  the 
  concentration 
  of 
  argon 
  from 
  the 
  atmosphere. 
  — 
  Phil. 
  Mag., 
  

   Feb. 
  1900, 
  p. 
  220. 
  

  

  2. 
  Influence 
  of 
  Water 
  on 
  the 
  Combustion 
  of 
  Carbon 
  Monoxide 
  ; 
  

   by 
  G. 
  Maktix. 
  (Abstract.) 
  Chemical 
  News, 
  vol. 
  lxxxi, 
  No. 
  2095. 
  

   Jan. 
  19th, 
  1900. 
  — 
  The 
  author 
  believes 
  that 
  the 
  action 
  of 
  water 
  in 
  

   facilitating 
  the 
  oxidation 
  of 
  CO 
  cannot 
  be 
  expressed 
  by 
  one 
  

   equation, 
  but 
  consists 
  of 
  several 
  reactions 
  — 
  one 
  predominating 
  at 
  

   one 
  time, 
  another 
  at 
  another 
  time, 
  according 
  to 
  the 
  amount 
  of 
  

   H 
  o 
  and 
  0„ 
  present. 
  This 
  accounts 
  for 
  the 
  lengthening 
  out 
  of 
  the 
  

   explosion 
  wave 
  when 
  the 
  quantity 
  of 
  steam 
  or 
  2 
  present 
  is 
  

   diminished. 
  As 
  regards 
  the 
  mechanism 
  of 
  the 
  process, 
  the 
  author 
  

   believes 
  that 
  the 
  H 
  2 
  molecule, 
  by 
  its 
  " 
  attractive 
  power 
  " 
  

   (evidences 
  of 
  which 
  he 
  sees 
  in 
  the 
  great 
  dissociating 
  power 
  of 
  

   water,) 
  alters 
  the 
  motion 
  of 
  the 
  atoms 
  in 
  neighboring 
  molecules. 
  

   This 
  intramolecular 
  alteration 
  in 
  strain, 
  together 
  with 
  the 
  pres- 
  

   ence 
  of 
  free 
  O, 
  determines 
  the 
  reaction— 
  much 
  in 
  the 
  same 
  way 
  

   that 
  finely 
  divided 
  gold, 
  etc., 
  causes 
  the 
  decomposition 
  of 
  H 
  2 
  2 
  . 
  

   This 
  view 
  explains 
  the 
  action 
  of 
  H 
  2 
  in 
  dissociating 
  NH 
  4 
  C1 
  

   vapors, 
  — 
  the 
  motion 
  of 
  the 
  atoms 
  within 
  the 
  NH 
  4 
  C1 
  molecule 
  

   being 
  altered 
  by 
  the 
  attractive 
  power 
  of 
  H 
  2 
  0, 
  and 
  thus 
  it 
  

   dissociates. 
  The 
  author 
  considers 
  the 
  last 
  case 
  analogous 
  to 
  

   " 
  supercooling 
  " 
  in 
  liquids. 
  

  

  3. 
  The 
  combination 
  of 
  sulphur 
  dioxide 
  with 
  oxygen 
  ; 
  by 
  E. 
  J. 
  

   Russell 
  and 
  Xoemax 
  Smith. 
  — 
  The 
  authors 
  have 
  found 
  that 
  when 
  

   a 
  mixture 
  of 
  sulphur 
  dioxide 
  and 
  oxygen 
  acts 
  on 
  certain 
  oxides, 
  

   in 
  addition 
  to 
  the 
  absorption 
  of 
  the 
  sulphur 
  dioxide, 
  part 
  of 
  the 
  

   sulphur 
  dioxide 
  and 
  oxygen 
  combine 
  lorming 
  sulphur 
  trioxide, 
  

   this 
  being 
  apparently 
  due 
  to 
  the 
  " 
  surface 
  action 
  " 
  of 
  the 
  oxide. 
  

   The 
  extent 
  of 
  this 
  " 
  surface 
  action 
  " 
  varies 
  with 
  the 
  nature 
  and 
  

   physical 
  conditions 
  of 
  each 
  oxide. 
  No 
  sulphur 
  trioxide 
  was 
  ever 
  

   found 
  unless 
  a 
  simultaneous 
  absorption 
  of 
  sulphur 
  dioxide 
  occurred 
  ; 
  

   when 
  manganese 
  peroxide 
  and 
  sulphur 
  dioxide, 
  dried 
  by 
  phos- 
  

   phorus 
  pentoxide, 
  were 
  brought 
  together, 
  no 
  absorption 
  took 
  

   place, 
  nor 
  was 
  any 
  sulphur 
  trioxide 
  produced 
  on 
  the 
  addition 
  of 
  

   dried 
  oxygen. 
  

  

  If 
  a 
  mixture 
  of 
  dried 
  sulphur 
  dioxide 
  and 
  oxygen 
  be 
  passed 
  

   over 
  well-dried 
  platinized 
  pumice 
  heated 
  to 
  400-450°, 
  very 
  little 
  

   sulphur 
  trioxide 
  is 
  formed, 
  and 
  the 
  drier 
  the 
  materials 
  the 
  less 
  is 
  

   the 
  combination. 
  — 
  Proc. 
  Chem. 
  Soc, 
  p. 
  41, 
  1900. 
  

  

  4. 
  Determination 
  of 
  Radicles 
  in 
  Carbon 
  Compounds. 
  By 
  

   Dr. 
  H. 
  Meyer. 
  Authorized 
  translation 
  by 
  J. 
  Bishop 
  Tingle, 
  

   Ph.D. 
  ]2mo, 
  pp. 
  x, 
  133. 
  New 
  York, 
  1899. 
  (John 
  Wiley 
  & 
  

   Sons.) 
  — 
  Dr. 
  Tingle 
  has 
  done 
  a 
  good 
  service 
  in 
  translating 
  into 
  

  

  