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  REPOKT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

   (a) 
  the 
  car 
  OFl 
  BAC. 
  

  

  The 
  requirements 
  for 
  the 
  inclosure 
  were 
  as 
  follows: 
  

  

  1. 
  It 
  should 
  allow 
  for 
  abundant 
  circulation 
  of 
  the 
  water 
  from 
  the 
  

   outside. 
  

  

  2. 
  It 
  should 
  have 
  as 
  few 
  corners 
  and 
  pockets 
  as 
  possible. 
  

  

  3. 
  It 
  should 
  be 
  fastened 
  so 
  that 
  it 
  could 
  be 
  readily 
  changed 
  and 
  

   cleaned. 
  

  

  4. 
  It 
  should 
  be 
  rigid 
  enough 
  to 
  keep 
  its 
  walls 
  out 
  of 
  the 
  propeller. 
  

  

  Diagram 
  of 
  apparatus 
  used 
  in 
  liatching 
  and 
  rearing 
  lobsters. 
  

  

  Material. 
  — 
  Galvanized-wire 
  netting 
  was 
  first 
  suggested 
  as 
  the 
  most 
  

   suitable 
  material 
  for 
  the 
  car. 
  This 
  was 
  soon 
  al)andoned 
  because 
  of 
  its 
  

   tendency 
  to 
  break, 
  and 
  because 
  it 
  was 
  feared 
  that 
  the 
  current 
  of 
  water 
  

   might 
  carr}^ 
  the 
  young 
  lobsters 
  ag^ainst 
  the 
  rigid 
  metal 
  and 
  fatally 
  

   injure 
  them. 
  The 
  cotton 
  scrim, 
  such 
  as 
  was 
  used 
  in 
  the 
  experiments 
  

   of 
  last 
  year, 
  was 
  considered 
  more 
  serviceable, 
  as 
  it 
  would 
  permit 
  free 
  

   circulation, 
  was 
  comparatively 
  inexpensive, 
  and 
  could 
  be 
  easily 
  cleaned. 
  

   The 
  only 
  difficulty 
  connected 
  with 
  its 
  use 
  was 
  keeping- 
  the 
  cloth 
  free 
  

   from 
  the 
  propeller 
  blade. 
  

  

  