﻿304 
  REPORT 
  OF 
  COMMISSIONER 
  OF 
  EISH 
  ANE- 
  FISHERIES. 
  [14] 
  

  

  vanized 
  iron 
  wire 
  netting, 
  with 
  1 
  to 
  14 
  inch 
  mesh. 
  At 
  the 
  top 
  they 
  

   are 
  open, 
  and 
  on 
  either 
  side 
  a 
  strong 
  strip 
  or 
  scantling- 
  is 
  secured 
  and 
  

   projects 
  out 
  past 
  the 
  ends 
  of 
  the 
  box 
  or 
  receptacle 
  to 
  afford 
  a 
  means 
  of 
  

   supporting 
  the 
  whole 
  upon 
  scantling 
  or 
  ledges 
  seemed 
  near 
  the 
  tops 
  of 
  

   the 
  sides 
  of 
  the 
  canals 
  s. 
  These 
  projections 
  of 
  the 
  strips 
  are 
  also 
  in- 
  

   tended 
  to 
  afford 
  handles 
  by 
  which 
  two 
  men 
  may 
  lift 
  and 
  move 
  the 
  appa- 
  

   ratus 
  about. 
  The 
  uprights 
  at 
  the 
  ends 
  and 
  the 
  horizontal 
  cross-bars 
  

   are 
  intended 
  to 
  enable 
  the 
  culturist 
  to 
  vibrate 
  the, 
  box 
  and 
  its 
  contents 
  

   in 
  the 
  water 
  of 
  the 
  canal 
  without 
  lifting 
  it 
  out 
  and 
  in 
  such 
  a 
  way 
  as 
  to 
  

   wash 
  off 
  any 
  injurious 
  accumulation 
  of 
  sediment 
  not 
  swept 
  away 
  by 
  the 
  

   action 
  of 
  the 
  jetties 
  presently 
  to 
  be 
  described. 
  

  

  These 
  baskets 
  or 
  receptacles 
  are 
  open 
  at 
  the 
  top 
  and 
  are 
  intended 
  to 
  

   be 
  filled 
  with 
  clean 
  oyster 
  or 
  clam 
  shells 
  as 
  cultch 
  for 
  the 
  spat. 
  They 
  

   are 
  each 
  to 
  hold 
  about 
  3 
  bushels 
  of 
  shells, 
  a 
  quantity 
  as 
  large 
  as 
  can 
  

   be 
  conveniently 
  handled 
  by 
  two 
  men. 
  One 
  hundred 
  of 
  these 
  will 
  there- 
  

   fore 
  contain 
  300 
  bushels 
  of 
  cultch 
  ; 
  though 
  I 
  actually 
  believe 
  that 
  four 
  

   hundred 
  such 
  boxes, 
  or 
  1,200 
  bushels 
  of 
  cultch 
  through 
  which 
  sea- 
  

   water 
  charged 
  with 
  fry 
  thrown 
  off 
  by 
  100 
  bushels 
  of 
  spawning 
  oysters 
  

   would 
  pass 
  would 
  not 
  afford 
  too 
  great 
  an 
  amount 
  of 
  spatting 
  surface, 
  

   because 
  we 
  have 
  shown 
  on 
  the 
  basis 
  of 
  actual 
  observation, 
  that 
  a 
  body 
  

   of 
  water 
  adapted 
  to 
  oyster 
  culture 
  is 
  capable 
  of 
  yielding 
  spat 
  through- 
  

   out 
  all 
  of 
  its 
  three 
  dimensions. 
  

  

  These 
  boxes 
  or 
  frames, 
  after 
  they 
  are 
  filled 
  with 
  the 
  cultch, 
  are 
  sus- 
  

   pended 
  in 
  the 
  canals, 
  the 
  cross-section 
  of 
  which 
  they 
  should 
  nearly 
  fill 
  

   at 
  low 
  tide. 
  They 
  are 
  placed 
  with 
  their 
  widest 
  dimension 
  across 
  the 
  

   canal, 
  sO 
  that 
  during 
  the 
  rise 
  and 
  fall 
  of 
  the 
  tide 
  the 
  water 
  has 
  to 
  rush 
  

   through 
  them 
  no 
  less 
  than 
  four 
  times 
  daily, 
  and 
  as 
  the 
  water 
  is 
  thor- 
  

   oughly 
  charged 
  with 
  embryos, 
  the 
  greatest 
  possible 
  opportunity 
  is 
  af- 
  

   forded 
  the 
  young 
  fry 
  to 
  affix 
  itself. 
  

  

  In 
  order 
  to 
  still 
  further 
  guard 
  against 
  the 
  accumulation 
  of 
  sediment 
  

   it 
  is 
  proposed 
  to 
  place 
  jetties 
  across 
  the 
  canals, 
  as 
  shown 
  in 
  the 
  ground 
  

   plan 
  at 
  the 
  points;. 
  These 
  may 
  consist 
  of 
  boards, 
  forming 
  a 
  frame, 
  

   which 
  may 
  slide 
  into 
  or 
  be 
  secured 
  by 
  vertical 
  ledges 
  fastened 
  to 
  the 
  

   sides 
  of 
  the 
  canal. 
  These 
  jetties 
  may 
  have 
  one 
  or 
  two 
  wide 
  vertical 
  slots 
  

   in 
  them, 
  through 
  which 
  the 
  tide 
  will 
  be 
  compelled 
  to 
  flow 
  with 
  augmented 
  

   velocity, 
  and 
  thus 
  scour 
  the 
  sediment 
  off 
  of 
  the 
  cultch 
  contained 
  in 
  the 
  

   suspended 
  boxes 
  or 
  frames 
  on 
  either 
  side 
  of 
  them. 
  Such 
  jetties 
  may 
  

   be 
  placed 
  at 
  intervals 
  along 
  the 
  canal, 
  and 
  they 
  might 
  be 
  made 
  mova- 
  

   ble 
  so 
  as 
  to 
  be 
  changed 
  in 
  order 
  to 
  affect 
  other 
  sets 
  of 
  boxes 
  of 
  cultch 
  

   at 
  other 
  points 
  along 
  the 
  sluice. 
  

  

  The 
  system 
  of 
  canals 
  as 
  shown 
  in 
  the 
  plans 
  should 
  hold 
  about 
  400 
  

   receptacles 
  filled 
  with 
  shells, 
  or 
  at 
  least 
  1,200 
  bushels 
  of 
  cultch. 
  In 
  

   practice 
  I 
  think 
  it 
  probable 
  that 
  even 
  a 
  longer 
  system 
  of 
  canals 
  will 
  be 
  

   found 
  available, 
  but 
  it 
  must 
  always 
  he 
  borne 
  in 
  mind 
  that 
  the 
  area 
  of 
  

   the 
  pond 
  must 
  not 
  very 
  greatly 
  exceed 
  the 
  total 
  area 
  of 
  the 
  system 
  of 
  

   canals, 
  or 
  else 
  so 
  much 
  more 
  water 
  will 
  run 
  out 
  of 
  the 
  pond 
  at 
  every 
  

  

  