﻿56 
  

  

  one 
  of 
  sinall 
  capacity, 
  working 
  slowly. 
  Probably 
  enough 
  

   aerated 
  water 
  would 
  pass 
  tlirougli 
  the 
  liatching 
  chamber 
  

   by 
  being 
  changed 
  24 
  to 
  48 
  times 
  in 
  the 
  course 
  of 
  24 
  hours, 
  

   to 
  ensure 
  the 
  success 
  of 
  this 
  method 
  of 
  artificially 
  incu- 
  

   bating 
  the 
  artificially 
  impregnated 
  eggs. 
  Difficulties 
  

   might 
  be 
  experienced 
  in 
  keeping 
  the 
  membranes 
  from 
  

   clogging 
  in 
  the 
  practical 
  conduct 
  of 
  the 
  work 
  of 
  incuba- 
  

   tion 
  by 
  either 
  of 
  the 
  methods 
  which 
  I 
  have 
  proposed, 
  but 
  

   this 
  could 
  easily 
  be 
  remedied 
  by 
  filtering 
  the 
  water 
  to 
  be 
  

   passed 
  through 
  the 
  hatching 
  chambers, 
  through 
  moder- 
  

   ately 
  coarse 
  cloths, 
  and 
  by 
  carefully 
  keeping 
  the 
  outer 
  

   canvas 
  covering 
  the 
  membranes 
  clean, 
  and 
  l)y 
  renewing 
  

   both 
  canvas 
  and 
  membranes 
  from 
  time 
  to 
  time. 
  

  

  The 
  importance 
  and 
  value 
  of 
  an 
  apparatus 
  by 
  the 
  help 
  

   of 
  Avhicli 
  the 
  oyster 
  may 
  be 
  artificiallj^ 
  hatched 
  and 
  taken 
  

   care 
  of 
  up 
  to 
  the 
  critical 
  period 
  when 
  the 
  young 
  larvae 
  

   fix 
  themselves, 
  can 
  hardly 
  be 
  over-rated, 
  because 
  if 
  this 
  

   can 
  be 
  achieved 
  a 
  new 
  lease 
  of 
  life 
  awaits 
  the 
  interests 
  of 
  

   oyster-culture. 
  There 
  may 
  be 
  difficulties 
  in 
  the 
  way 
  

   which 
  I 
  have 
  not 
  foreseen, 
  but 
  the 
  importance 
  of 
  the 
  

   plans 
  proposed 
  and 
  the 
  schemes 
  which 
  depend 
  upon 
  them 
  

   are 
  so 
  great 
  that 
  I 
  hope 
  to 
  be 
  pardoned 
  for 
  appearing 
  too 
  

   sanguine 
  in 
  mj^ 
  anticipations 
  of 
  success. 
  

  

  Should 
  snccess 
  attend 
  experiments 
  made 
  in 
  the 
  way 
  

   above 
  described, 
  so 
  far 
  as 
  to 
  keej) 
  the 
  larvae 
  in 
  a 
  healthy 
  

   state 
  up 
  to 
  and 
  including 
  the 
  period 
  when 
  they 
  fix 
  them- 
  

   selves, 
  it 
  will 
  be 
  necessary 
  to 
  provide 
  some 
  kind 
  of 
  col- 
  

   lecting 
  api)aratus 
  which 
  may 
  be 
  phiced 
  in 
  the 
  hatching 
  

   chambers 
  after 
  it 
  is 
  ascertained 
  at 
  Avliat 
  age 
  they 
  are 
  

   ready 
  for 
  fixation. 
  It 
  may 
  also 
  be 
  necessary 
  some 
  time 
  

   before 
  the 
  young 
  are 
  ready 
  to 
  attach 
  themselves 
  to 
  pro- 
  

   vide 
  them 
  with 
  food 
  by 
  passing 
  unliltered 
  water 
  into 
  the 
  

   -hatching 
  chamber 
  to 
  avoid 
  starving 
  them, 
  from 
  a 
  hose 
  or 
  

   vessel, 
  witliout 
  its 
  having 
  passed 
  tlirough 
  the 
  incurrent 
  

   membrane 
  which 
  filters 
  out 
  botli 
  the 
  dirt 
  and" 
  the 
  food 
  of 
  

   the 
  young 
  oysters. 
  The 
  collecting 
  a])])aratus 
  which 
  has 
  

   suggested 
  itself 
  to 
  me 
  and 
  which 
  1 
  think 
  miglit 
  be 
  used 
  

  

  