﻿53 
  

  

  to 
  stand 
  for 
  ten 
  or 
  fifteen 
  minutes, 
  and 
  then 
  shaken 
  again, 
  

   when 
  the 
  Avater 
  may 
  be 
  changed, 
  by 
  lifting 
  the 
  trays 
  out 
  of 
  

   the 
  pan, 
  and 
  fresh 
  water 
  added 
  ; 
  the 
  trays 
  may 
  then 
  be 
  trans- 
  

   ferred, 
  covered 
  by 
  water 
  in 
  the 
  pans, 
  to 
  the 
  hatching 
  jars.^ 
  in 
  

   the 
  hatching 
  house. 
  In 
  a 
  very 
  short 
  time 
  the 
  mucous 
  cover- 
  

   ing 
  .the 
  egg 
  will 
  harden, 
  and 
  adhere 
  to 
  the 
  gauze 
  upon 
  which 
  

   it 
  rests, 
  and 
  the 
  egg 
  will 
  thus 
  be 
  attached 
  firmly 
  to 
  its 
  sup- 
  

   port. 
  This 
  method 
  gives 
  the 
  least 
  handling 
  to 
  the 
  spawn, 
  

   and 
  accordingly 
  the 
  least 
  chance 
  for 
  injury 
  to 
  the 
  same. 
  I 
  

   liave 
  already 
  intimated 
  that 
  perhaps 
  a 
  goodly 
  portion 
  of 
  dead 
  

   eggs 
  Avere 
  caused 
  by 
  there 
  not 
  being 
  sufficient 
  milt 
  to 
  im- 
  

   pregnate 
  all 
  the 
  eggs 
  in 
  any 
  one 
  dish. 
  

  

  Generally 
  a 
  considerable 
  quantity 
  of 
  milt 
  is 
  considered 
  

   necessary, 
  because 
  very 
  little 
  time 
  is 
  given 
  to 
  the 
  manipula- 
  

   tion 
  of 
  the 
  spawn; 
  and 
  certainly 
  the 
  greater 
  tlic 
  amount 
  of 
  

   milt, 
  the 
  less 
  the 
  time 
  necessary 
  in 
  manipulating. 
  But 
  with 
  

   a 
  very 
  little 
  milt 
  a 
  large 
  number 
  of 
  eggs 
  may 
  be 
  impreg- 
  

   nated, 
  if 
  sufficient 
  time 
  is 
  given, 
  and 
  the 
  whole 
  is 
  well 
  

   manipulated. 
  The 
  spawn 
  and 
  milt 
  must 
  also 
  be 
  fresh 
  from 
  

   the 
  fish, 
  and 
  hrourjlit 
  together 
  immediatehj 
  , 
  upon 
  water 
  being 
  

   added 
  to 
  either^ 
  since 
  water 
  soon 
  acts 
  upon 
  the 
  spawn, 
  so 
  as 
  

   to 
  prevent 
  any 
  eftect 
  upon 
  it 
  by 
  the 
  milt, 
  unless 
  the 
  milt 
  is 
  

   added 
  very 
  soon. 
  The 
  method 
  mentioned 
  seems 
  to 
  combine 
  

   all 
  these 
  requisites, 
  and 
  in 
  the 
  case 
  of 
  the 
  spawn 
  already 
  

   mentioned, 
  had 
  the 
  manipulation 
  been 
  more 
  prolonged 
  when 
  

   milt 
  was 
  scarce, 
  perhaps 
  fewer 
  eggs 
  might 
  have 
  died. 
  And 
  

   I 
  have 
  no 
  doubt 
  at 
  present 
  time, 
  that 
  if, 
  besides 
  additional 
  

   manipulation, 
  the 
  spawn 
  and 
  milt 
  had 
  been 
  placed 
  together 
  

   dry, 
  before 
  any 
  water 
  at 
  all 
  had 
  been 
  added, 
  a 
  still 
  larger 
  

   proportion 
  of 
  live 
  eggs 
  would 
  have 
  been 
  the 
  result. 
  

  

  To 
  obviate 
  any 
  such 
  chance 
  of 
  lack 
  of 
  milt, 
  although 
  the 
  

   stirring 
  and 
  shaking 
  of 
  the 
  eggs 
  should 
  in 
  all 
  case 
  be 
  con- 
  

  

  'It 
  will 
  be 
  noticed 
  that 
  I 
  always 
  speak 
  of 
  the 
  liaicMng 
  jars, 
  meaniug 
  

   thereby 
  the 
  Ferguson 
  hatching 
  jar. 
  This 
  apparatus 
  is 
  so 
  simple, 
  and 
  so 
  exactly 
  

   adapted 
  for 
  the 
  purposes 
  of 
  hutching 
  eggs 
  or 
  spawn 
  of 
  any 
  description, 
  that 
  

   after 
  trial 
  I 
  think 
  no 
  one 
  will 
  care 
  to 
  use 
  any 
  other 
  description 
  ol 
  hatchiag 
  

   apparatus. 
  

  

  