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  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  I^'roni 
  time 
  to 
  time 
  supplies 
  of 
  fish 
  were 
  brought 
  iu 
  from 
  the 
  stations 
  

   of 
  the 
  Commissiou 
  and 
  the 
  fiehl-eollecting- 
  stations, 
  so 
  that 
  there 
  was 
  no 
  

   perceptible 
  change, 
  exc^ept 
  that 
  as 
  the 
  water 
  became 
  cooler 
  the 
  supply 
  

   and 
  varieties 
  of 
  trouts 
  were 
  largely 
  increased. 
  

  

  The 
  average 
  temperatures 
  of 
  salt 
  and 
  fresh 
  water 
  for 
  September, 
  

   October, 
  November, 
  and 
  DecembeJr 
  are 
  given 
  in 
  the 
  following 
  table: 
  

  

  St'iiteiiiber 
  

   October 
  . 
  . 
  . 
  

   November 
  

   December. 
  

  

  FOOD. 
  

  

  The 
  food 
  used 
  was 
  round 
  beefsteak, 
  beef 
  livers, 
  clams, 
  and 
  fiddler- 
  

   crabs. 
  The 
  beef 
  and 
  liver 
  were 
  cut 
  into 
  small 
  pieces 
  and 
  care 
  was 
  

   taken 
  to 
  remove 
  all 
  of 
  the 
  fat 
  and 
  sinews. 
  All 
  of 
  the 
  marine 
  species 
  

   except 
  the 
  trigger-fishes 
  and 
  file-fishes 
  took 
  the 
  beef 
  readily, 
  especially 
  

   if 
  it 
  was 
  slightly 
  salted. 
  The 
  trigger-fishes 
  and 
  file-fishes 
  were 
  fed 
  

   entirely 
  on 
  clams. 
  The 
  fiddler-crabs 
  intended 
  for 
  food 
  were 
  shijiped 
  by 
  

   express 
  from 
  Pensacola 
  by 
  Lieutenant 
  Swift 
  from 
  time 
  to 
  time 
  as 
  they 
  

   were 
  needed, 
  and 
  no 
  difficulty 
  was 
  experienced 
  in 
  keeping 
  them 
  for 
  an 
  

   indefinite 
  period 
  in 
  a 
  box 
  of 
  slightly 
  moistened 
  sand. 
  The 
  fish 
  were 
  

   fed 
  regularly 
  once 
  a 
  day, 
  except 
  Sunday, 
  and 
  seemed 
  to 
  thrive 
  after 
  

   they 
  became 
  accustomed 
  to 
  confinement. 
  

  

  PRACTICAL 
  FISH-CULTURE. 
  

  

  To 
  illustrate 
  practically 
  the 
  methods 
  employed 
  at 
  the 
  various 
  stations 
  

   of 
  the 
  Commissiou, 
  two 
  hatching 
  troughs 
  were 
  fitted 
  up, 
  one 
  with 
  gravel 
  

   for 
  the 
  hatching 
  and 
  rearing 
  of 
  trout, 
  one 
  with 
  trays 
  for 
  salmon, 
  and 
  a 
  

   table 
  with 
  8 
  McDonald 
  jars 
  for 
  whitefish 
  and 
  other 
  similar 
  eggs. 
  It 
  

   Avas 
  hoped 
  that 
  it 
  would 
  be 
  possible 
  to 
  do 
  practical 
  work 
  throughout 
  

   the 
  Exposition, 
  but 
  owing 
  to 
  the 
  high 
  temperature 
  of 
  the 
  water 
  all 
  the 
  

   eggs 
  shipped 
  to 
  Atlanta 
  previous 
  to 
  December 
  4 
  died 
  after 
  being 
  in 
  the 
  

   troughs 
  and 
  Jars 
  from 
  2 
  to 
  G 
  days. 
  A 
  consignment 
  of 
  10,000 
  lake-trout 
  

   eggs 
  received 
  on 
  that 
  date 
  from 
  Alpena, 
  Mich., 
  hatched 
  on 
  the 
  15th, 
  

   with 
  a 
  loss 
  of 
  only 
  300, 
  thus 
  showing 
  that 
  the 
  previous 
  losses 
  had 
  been 
  

   due 
  to 
  the 
  temperature 
  of 
  the 
  water 
  and 
  not 
  to 
  the 
  use 
  of 
  alum 
  iu 
  its 
  fil- 
  

   tration. 
  The 
  water 
  temperature 
  was 
  .")4o 
  on 
  the 
  day 
  they 
  were 
  received, 
  

   but 
  it 
  fell 
  to 
  45° 
  by 
  the 
  time 
  they 
  had 
  finished 
  hatching. 
  The 
  fry 
  result- 
  

   ing 
  from 
  the 
  eggs 
  were 
  held 
  until 
  the 
  sac 
  was 
  absorbed 
  and 
  then 
  planted 
  

   in 
  a 
  pond 
  near 
  Atlanta, 
  belonging 
  to 
  Mr. 
  T. 
  J. 
  Barnard. 
  A 
  shipment 
  

   of 
  10,000 
  (piinnat 
  salmon 
  eggs 
  received 
  from 
  Baird, 
  Cal., 
  on 
  the 
  10th 
  

  

  