﻿CORRECTION 
  TO 
  BAROMETER 
  FOR 
  FORCE 
  OF 
  WIND. 
  

  

  381 
  

  

  of 
  water 
  through 
  the 
  larger 
  tube 
  ; 
  and, 
  in 
  No. 
  5, 
  that 
  the 
  water 
  descending 
  ver- 
  

   tically 
  in 
  the 
  large 
  tube, 
  draws 
  up 
  the 
  water 
  vertically 
  through 
  the 
  smaller. 
  

  

  Pig. 
  5. 
  

  

  Whilst 
  these 
  experiments 
  illustrate 
  each 
  other, 
  they 
  also 
  serve 
  to 
  illustrate 
  

   the 
  cause 
  of 
  the 
  depression 
  in 
  the 
  barometer 
  during 
  gales 
  of 
  wind 
  ; 
  for 
  the 
  rush 
  of 
  

   a 
  stream 
  of 
  wind 
  over 
  and 
  around 
  any 
  house 
  or 
  ship, 
  as 
  shewn 
  in 
  figs. 
  6 
  and 
  7, 
  

  

  Pie. 
  6. 
  

  

  Pig. 
  7. 
  

  

  must 
  have 
  the 
  same 
  effect 
  of 
  drawing 
  out 
  the 
  air 
  and 
  producing 
  a 
  partial 
  vacuum 
  

  

  VOL. 
  XX. 
  PART 
  III. 
  5 
  L 
  

  

  