﻿AND 
  BATTERY 
  DISCHARGER, 
  ETC., 
  ETC. 
  369 
  

  

  charged 
  with 
  electricity 
  than 
  the 
  adjoining 
  bodies, 
  the 
  excess 
  of 
  the 
  

   fluid 
  is 
  attracted 
  by 
  them, 
  while 
  it 
  is 
  inadequately 
  repelled 
  by 
  the 
  

   inferior 
  quantity 
  of 
  the 
  electric 
  fluid, 
  with 
  which 
  they 
  are 
  imbued. 
  It 
  

   follows 
  that 
  when 
  a 
  small 
  globe 
  is 
  made 
  positive 
  in 
  the 
  neighbourhood 
  

   of 
  a 
  large 
  one, 
  the 
  excess 
  of 
  electric 
  matter 
  in 
  the 
  former, 
  is 
  attracted 
  

   by 
  all 
  the 
  negatively 
  excited 
  metal 
  in 
  the 
  latter. 
  When 
  the 
  small 
  

   globe 
  is 
  made 
  negative, 
  the 
  metal 
  of 
  which 
  it 
  consists 
  attracts 
  all 
  the 
  

   electric 
  matter 
  in 
  the 
  large 
  globe. 
  Hence 
  there 
  is 
  this 
  difference 
  in 
  

   the 
  two 
  cases 
  ; 
  the 
  small 
  globe 
  being 
  positive, 
  a 
  comparatively 
  small 
  

   movable 
  mass 
  of 
  electric 
  matter, 
  is 
  attracted 
  by 
  a 
  large 
  immovable 
  

   mass 
  of 
  metal 
  : 
  the 
  small 
  globe 
  being 
  made 
  negative, 
  a 
  large 
  movable 
  

   mass 
  of 
  electric 
  matter 
  is 
  attracted 
  by 
  a 
  small 
  immovable 
  mass 
  of 
  

   metal. 
  The 
  charge 
  being 
  in 
  both 
  cases 
  the 
  effect 
  of 
  the 
  same 
  ma- 
  

   chine; 
  the 
  attractive 
  power 
  must 
  be 
  as 
  great 
  in 
  one 
  case 
  as 
  in 
  the 
  

   other. 
  The 
  forces 
  by 
  which 
  the 
  masses 
  are 
  actuated 
  being 
  therefore 
  

   equal, 
  it 
  is 
  quite 
  reasonable 
  that 
  the 
  greatest 
  projectile 
  power 
  should 
  

   be 
  attained, 
  when 
  the 
  small 
  mass 
  is 
  movable. 
  In 
  that 
  case, 
  it 
  will 
  

   require 
  less 
  air 
  to 
  be 
  removed 
  in 
  order 
  to 
  effect 
  a 
  passage. 
  

  

  There 
  is 
  an 
  analogy 
  between 
  the 
  difference 
  which 
  I 
  suppose 
  to 
  exist 
  

   in 
  the 
  case 
  under 
  consideration, 
  and 
  that 
  which 
  may 
  be 
  observed 
  be- 
  

   tween 
  the 
  penetrating 
  power 
  of 
  a 
  rod 
  which 
  is 
  blunt, 
  and 
  one 
  which 
  

   is 
  pointed. 
  

  

  It 
  remains 
  to 
  show 
  why 
  a 
  large 
  mass 
  of 
  electric 
  matter 
  will 
  be 
  dis- 
  

   charged 
  in 
  a 
  spark 
  when 
  there 
  is 
  sufficient 
  proximity, 
  although 
  that 
  

   electric 
  matter 
  be 
  situated 
  in 
  the 
  large 
  globe, 
  and 
  attracted 
  by 
  the 
  

   other, 
  under 
  circumstances 
  in 
  which, 
  as 
  above 
  stated, 
  it 
  would 
  not 
  pass 
  

   without 
  that 
  proximity. 
  

  

  It 
  must 
  be 
  evident 
  that 
  attraction 
  increases, 
  as 
  the 
  distance 
  between 
  

   the 
  bodies 
  which 
  exercise 
  it 
  lessens. 
  Of 
  course 
  the 
  attraction 
  of 
  the 
  

   small 
  globe 
  must 
  always 
  act 
  more 
  powerfully 
  on 
  those 
  portions 
  of 
  the 
  

   electric 
  fluid, 
  which 
  occupy 
  the 
  nearest 
  parts 
  of 
  the 
  positively 
  excited 
  

   globe. 
  But 
  this 
  difference 
  of 
  distance, 
  and 
  consequent 
  diversity 
  of 
  

   attraction, 
  increases 
  as 
  the 
  globes 
  are 
  approximated. 
  Thus 
  that 
  portion 
  

   of 
  the 
  electric 
  fluid 
  which 
  sustains 
  this 
  pre-eminent 
  attraction, 
  will 
  

   be 
  accumulated 
  into 
  a 
  conoid 
  ; 
  the 
  acuteness 
  of 
  which, 
  and 
  attraction 
  

   causing 
  the 
  acuteness, 
  increasing 
  with 
  the 
  proximity, 
  there 
  will 
  at 
  last 
  

   vol. 
  v. 
  — 
  4 
  T 
  

  

  