﻿MANUAL 
  OF 
  FISH-CULTURE. 
  101 
  

  

  are 
  packed 
  tightly 
  around 
  the 
  crate, 
  a 
  few 
  being 
  thrown 
  in 
  and 
  pounded 
  

   down 
  securely 
  before 
  more 
  are 
  added. 
  This 
  must 
  be 
  well 
  done, 
  as 
  the 
  

   shavings 
  are 
  the 
  only 
  means 
  of 
  preventing 
  a 
  change 
  in 
  the 
  position 
  of 
  

   the 
  crate. 
  The 
  top 
  of 
  the 
  crate 
  is 
  then 
  covered 
  with 
  closely 
  packed 
  

   shavings 
  and 
  the 
  cover 
  of 
  the 
  case 
  screwed 
  on. 
  By 
  means 
  of 
  rope 
  or 
  

   iron 
  handles 
  the 
  case 
  may 
  now 
  be 
  moved 
  about 
  with 
  ease, 
  and 
  is 
  ready 
  

   for 
  shipment. 
  

  

  REFRIGERATOR 
  BOX 
  FOR 
  SHIPMENTS 
  ABROAD. 
  

  

  A 
  double 
  box 
  is 
  used 
  for 
  this 
  purpose. 
  The 
  inside 
  one 
  is 
  2i 
  inches 
  

   larger 
  on 
  all 
  sides 
  than 
  the 
  crate 
  of 
  trays, 
  and 
  the 
  outside 
  one 
  large 
  

   enough 
  to 
  make 
  a 
  5-incli 
  space 
  on 
  all 
  sides 
  when 
  the 
  smaller 
  box 
  

   is 
  placed 
  within 
  it. 
  The 
  trays 
  of 
  eggs 
  are 
  prepared 
  as 
  in 
  ordinary 
  

   shipments, 
  and 
  when 
  crated 
  are 
  placed 
  in 
  the 
  smaller 
  box 
  upon 
  a 
  frame 
  

   which 
  is 
  constructed 
  from 
  a 
  ^-incli 
  strip, 
  2J 
  inches 
  wide, 
  tacked 
  at 
  right 
  

   angles 
  to 
  the 
  inside 
  and 
  bottom 
  of 
  this 
  box. 
  In 
  the 
  chamber 
  thus 
  

   formed 
  between 
  the 
  crate 
  and 
  the 
  box 
  is 
  packed 
  finely 
  chopped 
  ice, 
  an 
  

   exit 
  for 
  the 
  water 
  resulting 
  from 
  its 
  melting 
  being 
  provided 
  by 
  a 
  half 
  

   dozen 
  openings 
  in 
  the 
  bottom 
  of 
  the 
  box. 
  This 
  box 
  is 
  now 
  packed 
  

   a(;cording 
  to 
  the 
  same 
  plan 
  as 
  that 
  followed 
  with 
  the 
  shipments 
  for 
  a 
  

   short 
  distance. 
  Where 
  there 
  is 
  an 
  opportunity, 
  it 
  is 
  well 
  to 
  have 
  the 
  

   case 
  unpacked 
  en 
  route 
  and 
  new 
  ice 
  added. 
  

  

  Eggs 
  have 
  been 
  sent 
  in 
  this 
  manner 
  to 
  England, 
  Mexico, 
  Kew 
  Zea- 
  

   land, 
  Japan, 
  and 
  South 
  America. 
  

  

  DISEASES. 
  

  

  Jlrook-trout 
  fry 
  are 
  subject 
  to 
  diseases 
  and 
  epidemics, 
  and 
  extreme 
  

   measures 
  are 
  often 
  necessary 
  to 
  eradicate 
  these 
  evils. 
  Many 
  experi- 
  

   ments 
  have 
  been 
  made 
  to 
  discover 
  some 
  method 
  of 
  treatment 
  that 
  will 
  

   prevent 
  the 
  introduction 
  of 
  disease. 
  At 
  Northville 
  the 
  troughs 
  are 
  

   flushed 
  every 
  day 
  for 
  five 
  minutes 
  with 
  an 
  extra 
  supply 
  of 
  water, 
  and 
  

   twice 
  a 
  week 
  they 
  are 
  thoroughly 
  cleansed 
  with 
  a 
  stiff 
  brush 
  or 
  sponge. 
  

   The 
  fry 
  are 
  then 
  treated 
  with 
  a 
  weak 
  solution 
  of 
  salt, 
  which 
  is 
  allowed 
  

   to 
  remain 
  until 
  the 
  fish 
  show 
  signs 
  of 
  discomfort, 
  when 
  the 
  troughs 
  are 
  

   flushed 
  for 
  a 
  few 
  minutes 
  and 
  the 
  water 
  reduced 
  to 
  its 
  regular 
  flow. 
  

   As 
  the 
  fish 
  increase 
  in 
  size 
  they 
  may 
  be 
  thinned 
  out 
  in 
  the 
  trough 
  and 
  

   also 
  at 
  the 
  first 
  indication 
  of 
  disease. 
  

  

  