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  charge. 
  If; 
  consisted 
  of 
  two 
  tanks, 
  one 
  of 
  these 
  to 
  be 
  eleva- 
  

   ted 
  above 
  the 
  tanks 
  in 
  which 
  the 
  fish 
  were 
  to 
  be 
  placed, 
  and 
  

   located 
  under 
  one 
  of 
  the 
  skylights. 
  This 
  tank 
  supplied 
  the 
  

   water 
  to 
  the 
  vessels, 
  which 
  consisted 
  of 
  deep 
  tubs 
  swung 
  in 
  

   gimbals, 
  so 
  as 
  to 
  keep 
  them 
  liorizontal, 
  notwithstanding 
  the 
  

   motion 
  of 
  tlie 
  vessel. 
  

  

  The 
  water 
  was 
  transferred 
  from 
  the 
  reservoir 
  tlirough 
  rub- 
  

   ber 
  tubeS; 
  to 
  which 
  were 
  attached 
  a 
  contrivance 
  for 
  forcing 
  

   air 
  to 
  the 
  bottom 
  of 
  tlie 
  water 
  in 
  the 
  fish 
  tanks. 
  As 
  this 
  

   was 
  eftected 
  by 
  the 
  passage 
  of 
  the 
  water 
  through 
  the 
  tubes, 
  

   it 
  worked 
  automatically. 
  In 
  this 
  way 
  the 
  fish 
  were 
  supplied 
  

   with 
  the 
  necessary 
  oxygen. 
  

  

  The 
  overflow 
  was 
  conducted 
  into 
  a 
  tank 
  similar 
  to 
  and 
  of 
  

   the 
  same 
  capacity 
  as 
  that 
  above, 
  and 
  thence 
  transferred 
  by 
  

   moans 
  of 
  a 
  force 
  pump 
  to 
  the 
  distributing 
  tank. 
  In 
  this 
  

   manner, 
  a 
  constant 
  change 
  and 
  circulation 
  of 
  water 
  could 
  be 
  

   kept 
  up 
  without 
  annoyance 
  to 
  the 
  fish, 
  and 
  the 
  water 
  easily 
  

   saturated 
  Avith 
  atmosphere. 
  

  

  I 
  understand 
  that 
  Dr. 
  Hcssel 
  could 
  n(;t 
  get 
  sufficient 
  

   accommodations 
  on 
  the 
  New 
  York 
  steamer 
  in 
  which 
  he 
  took 
  

   passage, 
  and 
  therefore 
  did 
  not 
  use 
  the 
  apparatus. 
  

  

  The 
  fish 
  were 
  a 
  good 
  deal 
  bruised 
  on 
  the 
  passage, 
  and 
  

   arrived 
  in 
  bad 
  condition 
  ; 
  several 
  of 
  them 
  died 
  subsequent 
  

   to 
  their 
  arrival 
  at 
  Druid 
  Hill 
  Park. 
  With 
  the 
  increased 
  

   facilities 
  for 
  caring 
  for 
  the 
  fish 
  in 
  separate 
  ponds, 
  it 
  is 
  hoped 
  

   that 
  in 
  a 
  few 
  years, 
  the 
  young 
  from 
  these 
  several 
  importa- 
  

   tions 
  will 
  be 
  sufficiently 
  numerous 
  to 
  stock 
  many 
  of 
  the 
  

   ponds 
  to 
  which 
  these 
  fish 
  will 
  be 
  a 
  valuable 
  acquisition. 
  

  

  Especial 
  acknowledgment 
  is 
  due 
  to 
  the 
  Commissioners 
  of 
  

   Public 
  Parks, 
  who 
  have 
  aided, 
  w'ith 
  the 
  means 
  at 
  their 
  dispo- 
  

   sal, 
  the 
  work 
  of 
  construction 
  of 
  ponds, 
  &c., 
  when 
  the 
  specific 
  

   appropriations 
  have 
  been 
  inadequate 
  ; 
  and 
  to 
  the 
  Water 
  

   Board 
  of 
  Baltimore, 
  for 
  their 
  liberality 
  in 
  supplying 
  water 
  

   during 
  the 
  winter 
  months, 
  when 
  a 
  much 
  larger 
  supply 
  than 
  

   that 
  afforded 
  by 
  the 
  spring 
  is 
  necessary 
  for 
  carrying 
  on 
  the 
  

   extensive 
  operations 
  which 
  are 
  conducted 
  at 
  the 
  Hatching 
  

   House. 
  

  

  