﻿of 
  Solving 
  Algebraical 
  Equationfi. 
  

  

  811 
  

  

  attaclied 
  to 
  insulators. 
  These 
  are 
  necessary 
  in 
  order 
  to 
  keep 
  

   the 
  wires 
  tioht. 
  The 
  wires 
  are 
  No. 
  16 
  sinoie 
  cotton-covered 
  

  

  Fig. 
  4. 
  

  

  fi 
  

  

  'v^A 
  

  

  

  -e-f 
  

  

  wire, 
  and 
  pass 
  through 
  a 
  long 
  slit 
  cut 
  in 
  a 
  drawing-board 
  

   BB. 
  The 
  ammeters 
  A 
  are 
  any 
  of 
  the 
  ordinary 
  ammeters 
  

   used 
  in 
  the 
  laboratory 
  reading 
  up 
  to 
  10 
  amperes, 
  and 
  are 
  in 
  

   series 
  with 
  lamp-boards 
  and 
  rheostats. 
  The 
  currents 
  are 
  

   adjusted 
  to 
  the 
  required 
  A^alues, 
  and 
  a 
  sheet 
  o£ 
  sectional 
  

   paper 
  with 
  a 
  slit 
  in 
  it 
  is 
  put 
  on 
  the 
  board. 
  By 
  means 
  of 
  an 
  

   ordinary 
  charm-compass 
  the 
  neutral 
  points 
  can 
  then 
  be 
  readily 
  

   found. 
  It 
  is 
  advisable 
  to 
  make 
  a 
  little 
  sketch 
  of 
  the 
  lines 
  of 
  

   force 
  near 
  the 
  neutral 
  points, 
  as 
  this 
  is 
  a 
  help 
  in 
  indicating 
  

   their 
  true 
  position. 
  The 
  coordinates 
  of 
  these 
  points 
  read 
  off 
  

   from 
  the 
  sectional 
  paper 
  give 
  the 
  real 
  and 
  imaginary 
  roots 
  

   of 
  the 
  equation. 
  

  

  