﻿XOVIII 
  

  

  against 
  tlie 
  accunmlation 
  of 
  sediiiieiit 
  or 
  otlier 
  obstruc- 
  

   tive 
  matter. 
  

  

  The 
  coUeetor, 
  i\ 
  as 
  is 
  sliown 
  in 
  tlie 
  plates, 
  sliould 
  be 
  

   placed 
  at 
  the 
  h)west 
  point 
  in 
  the 
  pond 
  ; 
  and, 
  unless 
  ex- 
  

   cavated 
  in 
  very 
  hard 
  clay 
  soil, 
  should 
  be 
  both 
  floored 
  

   and 
  faced 
  with 
  plank, 
  cement 
  or 
  other 
  hard 
  material. 
  

   The 
  Carp, 
  it 
  will 
  be 
  remembered, 
  have 
  a 
  strong 
  tendency 
  

   to 
  bury 
  them-selves 
  in 
  the 
  mud 
  not 
  only 
  during 
  their 
  

   periods 
  of 
  semi-hibernation, 
  but 
  whenever 
  suddenly 
  

   alarmed 
  or 
  closely 
  pursued 
  ; 
  and 
  if 
  the 
  collector 
  has 
  been 
  

   constructed 
  as 
  suggested, 
  and 
  the 
  fish 
  are 
  gradually 
  drawn 
  

   into 
  it 
  with 
  tlie 
  subsiding 
  water, 
  all 
  danger 
  of 
  loss 
  on 
  

   this 
  account 
  will 
  l)e 
  obviated. 
  

  

  The 
  details 
  of 
  the 
  "overflow," 
  "outlet," 
  "collector," 
  

   &c., 
  may, 
  of 
  course, 
  be 
  somewhat 
  varied, 
  according 
  to 
  

   circumstances 
  : 
  but 
  the 
  general 
  rnquireiiients 
  of 
  a 
  pond 
  

   so 
  located 
  as 
  to 
  receive 
  its 
  supply 
  of 
  water 
  at 
  one 
  end, 
  

   and 
  to 
  dischaige 
  it 
  at 
  the 
  other, 
  are 
  believed 
  to 
  be 
  fully 
  

   answered 
  in 
  the 
  foregoing 
  descri^jfion. 
  

  

  Ponds 
  in 
  this 
  latitude 
  sliould 
  be 
  iiot 
  less 
  than 
  three 
  

   feet 
  in 
  depth 
  at 
  their 
  deepest 
  part^ 
  — 
  to 
  insure 
  the 
  fish 
  

   against 
  ))eing 
  frozen 
  in 
  severely 
  cold 
  weatlier 
  — 
  and 
  should 
  

   gradually 
  shoal 
  in 
  places 
  to 
  a 
  depth 
  of 
  one 
  or 
  two 
  inches 
  

   to 
  provide 
  the 
  shallows 
  required 
  for 
  spawning 
  x>urposes. 
  

   Small 
  knolls 
  and 
  islands 
  should 
  l)e 
  levelled 
  or 
  renu)ved, 
  

   as 
  they 
  generally 
  afford 
  harboring 
  places 
  for 
  the 
  enemies 
  

   of 
  fish. 
  

  

  Ponds 
  in 
  Tidal 
  Regions. 
  

  

  It 
  having 
  been 
  remarked 
  in 
  anothei- 
  connection 
  that 
  

   ponds 
  formed 
  by 
  the 
  reclamation 
  of 
  marshes 
  in 
  tidal 
  

   regions 
  might 
  also 
  prove 
  well 
  adapted 
  to 
  the 
  cultivation 
  

   of 
  the 
  Carp, 
  the 
  following 
  suggestions 
  are 
  added 
  with 
  

   especial 
  reference 
  to 
  the 
  peculiar 
  location 
  of 
  such 
  ponds. 
  

   The 
  collector 
  and 
  drain 
  ditches 
  sliould 
  be 
  constructed 
  

   and 
  arranged 
  in 
  accordance 
  with 
  the 
  instructions 
  already 
  

   given 
  — 
  the 
  collector 
  being 
  formed, 
  of 
  course, 
  at 
  the 
  low- 
  

   est 
  point 
  within 
  the 
  embankment. 
  

  

  