﻿368 
  APPENDIX. 
  

  

  six 
  to 
  nine 
  inches 
  diameter, 
  and 
  from 
  two 
  to 
  five 
  feet 
  in 
  

   length. 
  The 
  cylinder 
  is 
  placed 
  horizontally 
  across 
  the 
  

   frame, 
  leaving 
  room 
  for 
  the 
  clearer 
  on 
  one 
  side 
  and 
  the 
  

   hopper 
  on 
  the 
  other. 
  

  

  In 
  the 
  cylinder 
  is 
  fixed 
  an 
  iron 
  axis, 
  which 
  may 
  pass 
  

   quite 
  through, 
  or 
  consist 
  only 
  of 
  gudgeons 
  driven 
  into 
  

   each 
  end. 
  

  

  There 
  are 
  shoulders 
  on 
  this 
  axis 
  to 
  prevent 
  any 
  hori- 
  

   zontal 
  variation, 
  and 
  it 
  extends 
  so 
  far 
  without 
  the 
  frame 
  

   as 
  to 
  admit 
  a 
  winch 
  at 
  one 
  end, 
  by 
  which 
  it 
  is 
  put 
  in 
  

   motion, 
  and 
  so 
  far 
  at 
  the 
  other 
  end 
  as 
  to 
  receive 
  the 
  

   whirl 
  by 
  which 
  the 
  clearer 
  is 
  turned. 
  

  

  The 
  surface 
  of 
  the 
  cylinder 
  is 
  filled 
  with 
  teeth, 
  set 
  in 
  

   annular 
  rows, 
  which 
  are 
  at 
  such 
  a 
  distance 
  from 
  each 
  

   other 
  as 
  to 
  admit 
  a 
  cotton 
  seed 
  to 
  play 
  freely 
  in 
  the 
  

   space 
  between 
  them. 
  The 
  space 
  between 
  each 
  tooth, 
  in 
  

   the 
  same 
  row, 
  is 
  so 
  small 
  as 
  not 
  to 
  admit 
  a 
  seed 
  or 
  half 
  

   a 
  seed 
  to 
  enter 
  it. 
  These 
  teeth 
  are 
  made 
  of 
  stiff 
  iron 
  

   wire 
  driven 
  into 
  the 
  wood 
  of 
  the 
  cylinder. 
  The 
  teeth 
  

   are 
  all 
  inclosed 
  the 
  same 
  way, 
  and 
  in 
  such 
  a 
  manner 
  

   that 
  the 
  angle 
  included 
  between 
  the 
  tooth 
  and 
  a 
  tangent 
  

   drawn 
  from 
  the 
  point, 
  into 
  which 
  the 
  tooth 
  is 
  driven, 
  

   will 
  be 
  about 
  55 
  or 
  60 
  degrees. 
  

  

  The 
  gudgeons 
  of 
  the 
  cylinder 
  run 
  in 
  brass 
  boxes, 
  each 
  

   of 
  which 
  is 
  in 
  two 
  parts, 
  one 
  of 
  which 
  is 
  fixed 
  in 
  the 
  

   wood 
  of 
  the 
  frame, 
  and 
  the 
  other 
  is 
  confined 
  down 
  upon 
  

   the 
  axis 
  with 
  screws. 
  

  

  3d. 
  The 
  breast-work 
  is 
  fixed 
  above 
  the 
  cylinder, 
  

   parallel 
  and 
  contiguous 
  to 
  the 
  same. 
  It 
  has 
  transverse 
  

   grooves, 
  or 
  openings, 
  through 
  which 
  the 
  rows 
  of 
  teeth 
  

   pass 
  as 
  the 
  cylinder 
  revolves, 
  and 
  its 
  use 
  is 
  to 
  obstruct 
  

   the 
  seeds 
  while 
  the 
  cotton 
  is 
  carried 
  forward 
  through 
  

   the 
  grooves 
  by 
  the 
  teeth. 
  

  

  The 
  thickness 
  of 
  the 
  breast-work 
  is 
  two 
  and 
  a 
  half 
  or 
  

  

  