﻿i->7 
  

  

  with 
  good 
  results, 
  sli(»uld 
  be 
  made 
  of 
  siiiall 
  ])unclies 
  of 
  

   cottonwool, 
  strips 
  of 
  undyed 
  cloth, 
  bunches 
  of 
  bristles, 
  

   sheets 
  of 
  mica, 
  and 
  sinnlar 
  materials 
  which 
  would 
  afford 
  

   temporary 
  attachments 
  for 
  the 
  fry 
  and 
  which 
  afterwards 
  

   could 
  be 
  separated 
  when 
  ready 
  to 
  be 
  removed 
  to 
  more 
  

   commodious 
  quarters 
  or 
  artificial 
  nurseries. 
  In 
  oidei- 
  to 
  

   study 
  the 
  manner 
  in 
  which 
  the 
  fry 
  at 
  first 
  fixes 
  itself, 
  it 
  

   will 
  doul 
  )tless 
  be 
  necessary 
  to 
  use 
  cotton 
  wool, 
  thin 
  strips 
  

   of 
  mica, 
  or 
  glass. 
  It 
  is 
  only 
  by 
  this 
  means 
  that 
  the 
  true 
  

   character 
  of 
  the 
  attachment 
  can 
  be 
  learned 
  from 
  the 
  ob- 
  

   jects 
  themselves, 
  brought 
  on 
  to 
  the 
  stage 
  of 
  the 
  micro- 
  

   scope 
  in 
  an 
  entirely 
  undisturbed 
  condition. 
  Beyond 
  the 
  

   period 
  of 
  fixation 
  it 
  would 
  jDrobably 
  not 
  be 
  judicious 
  to 
  

   retain 
  the 
  fry 
  in 
  the 
  hatching 
  boxes, 
  because 
  they 
  are 
  

   now 
  in 
  a 
  condition 
  to 
  feed 
  actively, 
  and 
  should 
  be 
  placed 
  

   under 
  such 
  conditions 
  in 
  a 
  supply 
  of 
  constantly 
  changing 
  

   unfiltered 
  water, 
  as 
  will 
  supply 
  them 
  with 
  an 
  abundance 
  

   of 
  food. 
  This 
  brings 
  us 
  to 
  the 
  consideration 
  of 
  

  

  NUKSEKIES. 
  

  

  Thesp, 
  I 
  api>relu^nd, 
  would 
  best 
  ])e 
  made 
  in 
  the 
  form 
  

   of 
  galvanized 
  wire 
  cages, 
  of 
  s 
  inch 
  mesh 
  cloth, 
  inside 
  of 
  

   which 
  a 
  numb^'r 
  of 
  trays 
  might 
  be 
  placed 
  one 
  on 
  top 
  of 
  

   the 
  other. 
  These 
  trays 
  might 
  in 
  fact 
  be 
  made 
  to 
  answer 
  

   as 
  supports 
  for 
  the 
  collecting 
  apparatus 
  in 
  the 
  hatching- 
  

   boxes, 
  to 
  be 
  afterwards 
  transferred 
  with 
  the 
  affixed 
  spat 
  

   to 
  the 
  nursery 
  cages. 
  The 
  greatest 
  care 
  would 
  have 
  to 
  

   be 
  exercised 
  in 
  the 
  care 
  of 
  the 
  very 
  young 
  fry 
  until 
  it 
  

   was 
  about 
  ten 
  days 
  old 
  from 
  the 
  time 
  of 
  iixation. 
  2s 
  o 
  

   noxious 
  animal 
  growths 
  ought 
  to 
  be 
  permitted 
  to 
  grow 
  

   upon 
  the 
  trays 
  or 
  collecting 
  appai'atus 
  if 
  it 
  is 
  possible 
  to 
  

   prevent 
  it, 
  nor 
  should 
  the 
  fry 
  be 
  exposed 
  for 
  any 
  great 
  

   length 
  of 
  time 
  to 
  the 
  air, 
  which 
  would 
  no 
  doubt 
  be 
  very 
  

   injurious, 
  'i'lie 
  cages 
  if 
  totally 
  immersed 
  should 
  be 
  pro- 
  

   vided 
  witli 
  a 
  wire 
  cloth 
  cover 
  with 
  meshes 
  as 
  fine 
  as 
  

   those 
  of 
  the 
  sides 
  and 
  bottom 
  in 
  order 
  that 
  carnivorous 
  

   fishes 
  and 
  mollusks 
  mav 
  be 
  effectually 
  excluded. 
  After 
  

  

  