﻿154 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  FISH 
  AND 
  FISHERIES. 
  

  

  One 
  of 
  the 
  important 
  problems 
  in 
  the 
  constructiou 
  of 
  an 
  aquarium 
  

   is 
  to 
  arrange 
  so 
  that 
  it 
  will 
  not 
  become 
  overcrowded. 
  Profiting 
  by 
  

   our 
  experience 
  at 
  Chicago, 
  a 
  passageway 
  12 
  feet 
  wide 
  was 
  provided, 
  

   but 
  people 
  coming 
  in 
  from 
  both 
  ends 
  soon 
  packed 
  it, 
  and 
  it 
  was 
  almost 
  

   inii)Ossiblc 
  to 
  move 
  either 
  way. 
  This 
  was 
  largely 
  due 
  to 
  the 
  tact 
  that 
  

   there 
  were 
  fish 
  on 
  both 
  sides 
  of 
  the 
  grotto, 
  and 
  visitors 
  going 
  down 
  

   one 
  side 
  returned 
  on 
  the 
  other 
  instead 
  of 
  going 
  out. 
  This 
  might 
  have 
  

   been 
  avoided 
  by 
  placing 
  a 
  partition 
  down 
  the 
  center 
  of 
  the 
  aisle, 
  but 
  

   it 
  \M)nld 
  have 
  niarred 
  the 
  architectural 
  effect 
  of 
  the 
  grotto, 
  which 
  was 
  

  

  mnch 
  adnnred. 
  

  

  FBESH-WATEIl 
  SUPPLY. 
  

  

  The 
  water 
  for 
  the 
  fresh-water 
  side 
  of 
  the 
  aquarium 
  was 
  supplied 
  

   from 
  one 
  of 
  the 
  three 
  mains 
  laid 
  to 
  the 
  Government 
  building 
  and 
  

   connected 
  with 
  the 
  city 
  water 
  supply, 
  which 
  is 
  taken 
  from 
  the 
  Chatta- 
  

   lioochee 
  River. 
  Before 
  entering 
  the 
  aquarium 
  this 
  water 
  was 
  passed 
  

   through 
  a 
  pressure 
  filter 
  of 
  the 
  Jewell 
  pattern, 
  having 
  a 
  capacity 
  of 
  

   20,(){)0 
  gallons 
  per 
  hour, 
  but 
  as 
  it 
  had 
  already 
  been 
  filtered 
  at 
  the 
  city 
  

   waterworks 
  by 
  the 
  alum 
  coagulated 
  process, 
  it 
  was 
  unnecessary 
  to 
  use 
  

   tlie 
  alum 
  provided 
  by 
  the 
  Jewell 
  filter. 
  After 
  passing 
  through 
  the 
  

   filter 
  the 
  water 
  was 
  conducted 
  to 
  the 
  aijuaria 
  through 
  lA-inch 
  gal- 
  

   vanized-iron 
  pipes 
  fitted 
  with 
  ^-inch 
  brass 
  jet 
  cocks 
  and 
  arranged 
  

   horizontally 
  above 
  them. 
  The 
  waste 
  water 
  was 
  carried 
  off' 
  by 
  means 
  

   ol" 
  an 
  overflow 
  pipe 
  placed 
  in 
  the 
  end 
  of 
  the 
  aquaria 
  near 
  the 
  top, 
  and 
  

   discharged 
  into 
  a 
  trough 
  emptying 
  into 
  a- 
  nuinhole 
  connected 
  Avith 
  one 
  

   of 
  the 
  sewers. 
  

  

  SALT-WATER 
  SUPPLY. 
  

  

  The 
  salt 
  water 
  for 
  the 
  aquarium 
  was 
  obtained 
  at 
  Morehead 
  City, 
  

   N. 
  C, 
  and 
  transported 
  in 
  three 
  tank 
  cars 
  loaned 
  by 
  the 
  Standard 
  Oil 
  

   Company. 
  It 
  reached 
  Atlanta.August 
  2'A, 
  and 
  was 
  unloaded 
  as 
  soon 
  

   as 
  possible 
  and 
  placed 
  in 
  a 
  large 
  tank 
  constructed 
  for 
  it 
  under 
  the 
  

   aquarium. 
  Its 
  density 
  when 
  shipped 
  was 
  1.021, 
  temperature 
  80'^; 
  five 
  

   or 
  six 
  days 
  later 
  its 
  density 
  remained 
  the 
  same, 
  but 
  the 
  temperature 
  

   had 
  fallen 
  to 
  78°, 
  and 
  the 
  water 
  was 
  in 
  excellent 
  condition. 
  

  

  SALT-WATER 
  CIRCULATION. 
  

  

  The 
  two 
  jmrnps 
  used 
  for 
  circulating 
  the 
  water 
  were 
  of 
  the 
  Erwin- 
  

   Welch 
  ])attern, 
  having 
  a 
  power 
  cylinder 
  4 
  inches 
  in 
  diameter; 
  pump 
  

   cylinder, 
  5 
  inches; 
  stroke, 
  Oi 
  inches; 
  suction 
  inlet 
  to 
  pump, 
  2 
  inches 
  in 
  

   diameter; 
  discharge, 
  11 
  inches. 
  The 
  poAver 
  ends 
  were 
  of 
  brass 
  and 
  the 
  

   l)umping 
  ends 
  of 
  block 
  tin 
  hardened. 
  They 
  were 
  built 
  to 
  operate 
  under 
  

   a 
  nuninnim 
  water 
  ]n'essure 
  of 
  50 
  pounds, 
  and 
  were 
  so 
  designed 
  as 
  to 
  

   lift 
  the 
  water 
  through 
  their 
  suction 
  a 
  distance 
  of 
  10 
  feet 
  and 
  deliver 
  it 
  

   to 
  a 
  tank 
  oO 
  feet 
  above, 
  each 
  pump 
  delivering 
  900 
  gallons 
  per 
  hour. 
  

   The 
  pumps 
  could 
  be 
  operated 
  together 
  or 
  singly, 
  but 
  better 
  results 
  

   were 
  obtained 
  by 
  operating 
  them 
  together. 
  The 
  water 
  for 
  running 
  

   tliem 
  was 
  taken 
  from 
  the 
  main 
  located 
  under 
  the 
  Government 
  building, 
  

   the 
  average 
  pressure 
  being 
  about 
  80 
  pounds 
  per 
  sipuire 
  inch, 
  though 
  it 
  

  

  