﻿MANUAL 
  OF 
  FISH-CULTURE. 
  87 
  

  

  in 
  the 
  bottom 
  of 
  the 
  box 
  to 
  a 
  depth 
  of 
  about 
  3 
  inches 
  and 
  the 
  crate 
  

   of 
  trays 
  placed 
  as 
  near 
  the 
  center 
  of 
  the 
  box 
  as 
  possible. 
  The 
  sides 
  

   are 
  well 
  packed 
  to 
  hold 
  it 
  firmly 
  in 
  position, 
  and 
  when 
  the 
  top 
  of 
  the 
  

   hopper 
  is 
  reached 
  with 
  the 
  packing 
  it 
  is 
  well 
  filled 
  with 
  ice, 
  the 
  remain- 
  

   ing 
  space 
  in 
  the 
  box 
  being 
  tilled 
  with 
  moss. 
  Wet 
  moss 
  or 
  wet 
  packing 
  

   of 
  any 
  kind 
  should 
  never 
  be 
  usi'd 
  for 
  the 
  cushion 
  around 
  the 
  egg-crate, 
  

   as 
  it 
  does 
  not 
  preserve 
  an 
  even 
  temperature 
  and 
  is 
  liable 
  to 
  freeze 
  solid 
  

   if 
  exijosed 
  to 
  a 
  low 
  temperature 
  in 
  transit. 
  A 
  cross-section 
  of 
  the 
  

   box 
  thus 
  packed 
  is 
  shown 
  on 
  page 
  84. 
  

  

  The 
  box 
  containing 
  the 
  eggs 
  should 
  be 
  provided 
  with 
  handles 
  to 
  

   facilitate 
  moving 
  during 
  transportation, 
  in 
  order 
  that 
  the 
  liability 
  to 
  

   injury 
  from 
  jarring 
  or 
  concussion 
  may 
  be 
  reduced. 
  For 
  a 
  long 
  journey 
  

   the 
  lid 
  of 
  the 
  box 
  is 
  provided 
  with 
  hinges 
  and 
  hasp 
  and 
  staple, 
  so 
  that 
  

   the 
  ice 
  may 
  be 
  easily 
  renewed. 
  Eggs 
  packed 
  as 
  described 
  above 
  have 
  

   been 
  shipped 
  with 
  safety 
  to 
  all 
  parts 
  of 
  the 
  United 
  States 
  and 
  to 
  for- 
  

   eign 
  countries. 
  

  

  DISEASES 
  OF 
  FRY 
  AND 
  ADULTS. 
  

  

  The 
  most 
  common 
  diseases 
  of 
  trout 
  fry 
  are 
  the 
  inflammation 
  of 
  their 
  

   gills 
  and 
  a 
  slimy 
  skin 
  disease, 
  which 
  may 
  be 
  caused 
  by 
  impure 
  water; 
  

   the 
  food 
  itself 
  may 
  produce 
  it, 
  especially 
  if 
  stale 
  liver 
  is 
  used, 
  but 
  it 
  

   generally 
  follows 
  fouling 
  of 
  the 
  water 
  while 
  feeding. 
  By 
  watching 
  

   the 
  movements 
  of 
  the 
  fish, 
  the 
  symptoms 
  of 
  disease 
  can 
  generally 
  be 
  

   detected 
  before 
  it 
  reaches 
  an 
  alarming 
  stage. 
  If 
  the 
  gills 
  are 
  affected 
  

   the 
  fish 
  will 
  usually 
  swim 
  high 
  in 
  the 
  water 
  in 
  an 
  uneasy, 
  restless 
  man- 
  

   ner, 
  as 
  if 
  gasping 
  for 
  breath, 
  and 
  when 
  this 
  is 
  observed 
  the 
  gills 
  must 
  

   be 
  examined 
  to 
  see 
  if 
  they 
  are 
  becoming 
  inflamed 
  and 
  swollen. 
  If 
  a 
  

   skin 
  disease 
  is 
  attacking 
  the 
  fish, 
  they 
  generally 
  indicate 
  it 
  by 
  rubbing 
  

   themselves 
  on 
  the 
  bottom 
  of 
  the 
  trough 
  or 
  against 
  anything 
  that 
  may 
  

   be 
  convenient, 
  or 
  by 
  diving 
  down 
  and 
  giving 
  themselves 
  a 
  quick, 
  twist- 
  

   ing 
  motion 
  against 
  the 
  bottom 
  of 
  the 
  trough. 
  If 
  the 
  progress 
  of 
  dis- 
  

   ease 
  is 
  not 
  promptly 
  checked, 
  it 
  will 
  soon 
  reach 
  a 
  stage 
  where 
  nothing 
  

   can 
  be 
  done, 
  and 
  the 
  fish 
  grow 
  weaker 
  every 
  day 
  until 
  they 
  begin 
  to 
  

   die 
  in 
  alarming 
  numbers. 
  One 
  of 
  the 
  best 
  remedies 
  for 
  both 
  diseases 
  

   is 
  salt 
  sprinkled 
  through 
  the 
  water 
  after 
  the 
  ponds 
  are 
  drawn 
  low, 
  and 
  

   for 
  a 
  bad 
  case 
  of 
  skin 
  disease 
  a 
  half 
  pint 
  of 
  salt 
  for 
  every 
  gallon 
  of 
  water 
  

   in 
  the 
  trough 
  is 
  used, 
  or 
  about 
  that 
  proportion. 
  The 
  fish 
  should 
  be 
  

   watched 
  closely 
  and 
  allowed 
  to 
  remain 
  in 
  the 
  salt 
  water 
  until 
  they 
  

   become 
  restless 
  and 
  begin 
  to 
  turn 
  on 
  their 
  sides. 
  Then, 
  as 
  fresh 
  water 
  

   is 
  turned 
  on 
  and 
  the 
  trough 
  fills, 
  a 
  slime 
  will 
  arise 
  and 
  float 
  on 
  top 
  of 
  

   the 
  water, 
  like 
  a 
  white 
  scum. 
  Coarse 
  sand 
  should 
  be 
  kept 
  in 
  the 
  trough 
  

   for 
  the 
  fish 
  to 
  rub 
  themselves 
  against. 
  Salt 
  is 
  also 
  good 
  for 
  the 
  dis- 
  

   eased 
  gills 
  and 
  will 
  free 
  them 
  from 
  adhering 
  sediment. 
  

  

  Fungus, 
  "blue 
  swelling," 
  and 
  other 
  diseased 
  conditions 
  sometimes 
  

   occur, 
  but 
  the 
  most 
  serious 
  diseases 
  of 
  the 
  fry 
  are 
  those 
  j 
  list 
  described. 
  

   Parasites 
  sometimes 
  attack 
  the 
  fish, 
  but 
  if 
  the 
  water 
  is 
  pure 
  and 
  the 
  

   fish 
  in 
  a 
  healthy 
  condition, 
  they 
  are 
  not 
  troublesome. 
  To 
  keep 
  the 
  fish 
  

  

  