﻿26 
  

  

  The 
  veseels 
  A 
  are 
  provided 
  at 
  the 
  top 
  with 
  suitable 
  handles 
  a 
  a, 
  and 
  are 
  

   Kuepended 
  by 
  means 
  of 
  wires, 
  cords 
  or 
  chains 
  b 
  b, 
  from 
  the 
  devices 
  herein- 
  

   after 
  described. 
  

  

  JE" 
  represents 
  the 
  hull 
  of 
  a 
  boat, 
  scow 
  or 
  other 
  vessel, 
  or 
  pier, 
  on 
  each 
  side 
  

   of 
  which 
  is 
  arranged 
  a 
  series 
  of 
  levers 
  D 
  D, 
  pivoted 
  on 
  such 
  boat 
  or 
  vessel, 
  

   and 
  their 
  outer 
  euds 
  projecting 
  a 
  suitable 
  distance 
  beyond 
  the 
  side 
  of 
  the 
  

   same. 
  These 
  levers 
  D 
  on 
  each 
  side 
  of 
  the 
  vessel 
  may 
  be 
  arranged 
  singly 
  or 
  

   ia 
  pairs. 
  If 
  in 
  the 
  latter 
  way, 
  the 
  two 
  levers 
  forming 
  a 
  pair 
  have 
  a 
  rod 
  d 
  

   passing 
  through 
  their 
  outer 
  ends, 
  and 
  a 
  series 
  of 
  vessels 
  A 
  are 
  suspended 
  

   from 
  said 
  rod 
  by 
  means 
  of 
  the 
  cords 
  or 
  chains 
  b. 
  

  

  The 
  vessels 
  ,1 
  thus 
  hang 
  outside 
  of 
  the 
  boat 
  or 
  vessel 
  in 
  the 
  water 
  in 
  such 
  

   a 
  manner 
  that, 
  when 
  the 
  lowest, 
  they 
  will 
  only 
  be 
  about 
  two-thirds 
  under 
  

   water. 
  The 
  inner 
  ends 
  of 
  the 
  corresponding 
  levers 
  on 
  the 
  two 
  sides 
  of 
  the 
  

   iKjat 
  may 
  be 
  connected 
  together 
  as 
  shown, 
  or 
  in 
  any 
  other 
  suitable 
  manner, 
  

   or 
  they 
  may 
  be 
  left 
  entirely 
  disconnected 
  if 
  so 
  desired. 
  These 
  levers 
  arc 
  

   operated 
  by 
  a 
  series 
  of 
  eccentrics 
  //, 
  set 
  at 
  varying 
  augles 
  upon 
  a 
  continu- 
  

   ously 
  rotating 
  shaft 
  G, 
  connected 
  to, 
  and 
  rotating 
  by 
  a 
  steam 
  engine, 
  or 
  

   other 
  suitable 
  motive 
  power. 
  

  

  The 
  levers 
  D 
  may 
  be 
  mounted 
  above 
  the 
  deck 
  of 
  the 
  vessel, 
  or 
  they 
  may 
  

   be 
  arranged 
  below 
  the 
  deck, 
  and 
  project 
  through 
  the 
  sides 
  of 
  the 
  vessel 
  ; 
  and 
  

   the 
  shaft, 
  with 
  the 
  eccentrics, 
  arranged 
  to 
  correspond 
  with 
  the 
  location 
  of 
  

   the 
  levers. 
  In 
  either 
  case, 
  these 
  eccentrics 
  should 
  be 
  of 
  such 
  form 
  that 
  a 
  

   f)low 
  motion 
  upward 
  would 
  be 
  secured 
  for 
  the 
  vessels 
  A, 
  while 
  they 
  should 
  

   move 
  more 
  rapid, 
  though 
  gradually, 
  downward. 
  

  

  By 
  this 
  means 
  a 
  current 
  is 
  created, 
  even 
  in 
  still 
  waters, 
  sufficient 
  to 
  keep 
  

   f 
  lie 
  eggs 
  placed 
  in 
  the 
  vessels 
  ,4 
  in 
  motion, 
  and 
  change 
  the 
  water 
  through 
  

   the 
  wire 
  cloths 
  in 
  the 
  bottoms 
  of 
  the 
  vessels. 
  

  

  When 
  the 
  boat 
  or 
  vessel 
  is 
  placed 
  in 
  water 
  having 
  a 
  suflicient 
  current, 
  no 
  

   movement 
  of 
  the 
  levers 
  D 
  is 
  necessary; 
  and 
  in 
  such 
  case, 
  each 
  vessel 
  A 
  is 
  

   held 
  in 
  an 
  inclined 
  position 
  by 
  means 
  of 
  a 
  side 
  chain 
  or 
  rope 
  e, 
  so 
  as 
  to 
  allow 
  

   the 
  current 
  to 
  pass 
  through 
  the 
  vessel. 
  lu 
  such 
  case, 
  as 
  well 
  as 
  in 
  storms 
  

   the 
  tops 
  L' 
  should 
  be 
  put 
  on 
  the 
  vessels 
  -1 
  to 
  protect 
  the 
  spawn. 
  

  

  The 
  vessels 
  A 
  being 
  cylindrical 
  in 
  form, 
  present 
  no 
  angles 
  or 
  corners 
  in 
  

   which 
  sediment, 
  dirt 
  or 
  matter 
  deleterious 
  to 
  tbe 
  life 
  and 
  development 
  of 
  

   tlie 
  spawn 
  can 
  collect, 
  and 
  they 
  arc 
  easily 
  kept 
  clean. 
  Being 
  made 
  of 
  sheet 
  

   metal 
  or 
  other 
  metallic 
  substance, 
  it 
  prevents 
  the 
  development 
  of 
  injurious 
  

   fungi 
  and 
  conferva. 
  Another 
  advantage 
  of 
  the 
  cylindrical 
  form 
  of 
  the 
  ves- 
  

   sels 
  is, 
  that 
  it 
  requires 
  less 
  force 
  in 
  its 
  movement 
  in 
  tlie 
  water 
  than 
  a 
  bos 
  

   having 
  angles 
  or 
  corners. 
  

  

  By 
  this 
  invention, 
  the 
  spawn 
  of 
  fishes 
  may 
  be 
  hatched 
  in 
  still 
  waters, 
  cur- 
  

   rents, 
  and 
  waters 
  exposed 
  to 
  storms. 
  

  

  flaving 
  thus 
  described 
  my 
  inveniion, 
  what 
  I 
  claim 
  as 
  new, 
  and 
  desire 
  to 
  

   secure 
  by 
  letters-patent, 
  is— 
  

  

  1st. 
  In 
  the 
  hatching 
  of 
  fish 
  spawn 
  : 
  the 
  method 
  of 
  producing 
  change 
  of 
  

   water 
  in 
  the 
  vessels 
  containing 
  the 
  spawn, 
  and 
  currents 
  for 
  moving 
  the 
  

  

  