﻿APPENDIX. 
  369 
  

  

  three 
  inches, 
  and 
  the 
  under 
  side 
  of 
  it 
  is 
  made 
  of 
  iron 
  or 
  

   brass. 
  

  

  4th. 
  The 
  clearer 
  is 
  placed 
  horizontally 
  with, 
  and 
  

   parallel 
  to, 
  the 
  cylinder. 
  Its 
  length 
  is 
  the 
  same 
  as 
  that 
  

   of 
  the 
  cylinder, 
  and 
  its 
  diameter 
  is 
  proportioned 
  by 
  

   convenience. 
  There 
  are 
  two, 
  four, 
  or 
  more 
  brushes 
  or 
  

   rows 
  of 
  bristles 
  fixed 
  in 
  the 
  surface 
  of 
  the 
  clearer, 
  in 
  

   such 
  manner 
  that 
  the 
  ends 
  of 
  the 
  bristles 
  will 
  sweep 
  

   the 
  surface 
  of 
  the 
  cylinder. 
  

  

  Its 
  axis 
  and 
  boxes 
  are 
  similar 
  to 
  those 
  of 
  the 
  cylinder. 
  

   It 
  is 
  turned 
  by 
  means 
  of 
  a 
  band 
  and 
  wheels, 
  moves 
  in 
  a 
  

   contrary 
  direction 
  from 
  the 
  cylinder, 
  by 
  which 
  it 
  is 
  put 
  

   in 
  motion, 
  and 
  so 
  far 
  outruns 
  it 
  as 
  to 
  sweep 
  the 
  cotton 
  

   from 
  the 
  teeth 
  as 
  fast 
  as 
  it 
  is 
  carried 
  through 
  the 
  

   breast-work. 
  

  

  The 
  periphery 
  of 
  the 
  whorls 
  is 
  spherical, 
  and 
  the 
  

   band 
  a 
  broad 
  strap 
  of 
  leather. 
  

  

  5th. 
  One 
  side 
  of 
  the 
  hopper 
  is 
  formed 
  by 
  the 
  breast- 
  

   work, 
  the 
  two 
  ends 
  by 
  the 
  frame, 
  and 
  the 
  other 
  side 
  is 
  

   movable 
  from 
  and 
  towards 
  the 
  breast-work, 
  so 
  as 
  to 
  

   make 
  the 
  hopper 
  more 
  or 
  less 
  capacious. 
  

  

  The 
  cotton 
  is 
  put 
  into 
  the 
  hopper, 
  carried 
  through 
  the 
  

   breast-work 
  by 
  the 
  teeth, 
  brushed 
  off 
  from 
  the 
  teeth 
  hy 
  

   the 
  clearer, 
  and 
  flies 
  off 
  from 
  the 
  clearer 
  with 
  the 
  as- 
  

   sistance 
  of 
  the 
  air, 
  by 
  its 
  own 
  centrifugal 
  force. 
  

  

  The 
  machine 
  is 
  turned 
  by 
  water, 
  horses, 
  or 
  in 
  an}- 
  

   other 
  way, 
  as 
  is 
  most 
  convenient. 
  

  

  There 
  are 
  several 
  modes 
  of 
  making 
  the 
  various 
  parts 
  

   of 
  the 
  machine, 
  which, 
  together 
  with 
  their 
  particular 
  

   shape 
  and 
  formation, 
  are 
  pointed 
  out 
  and 
  explained 
  in 
  

   a 
  description, 
  with 
  drawing, 
  attested 
  as 
  the 
  act 
  directs. 
  

  

  ELI 
  WHITNEY. 
  

  

  24 
  

  

  