﻿ARTICLE 
  XXIV. 
  

  

  On 
  the 
  Cause 
  of 
  the 
  Collapse 
  of 
  a 
  Reservoir 
  while 
  apparently 
  subjected 
  

   within 
  to 
  great 
  Pressure 
  from 
  a 
  Head 
  of 
  Water. 
  By 
  JR. 
  Hare, 
  M. 
  D., 
  

  

  Sfc., 
  Sfc., 
  Sfc. 
  

  

  In 
  September 
  1834, 
  I 
  was 
  requested 
  by 
  Mr 
  Haydock, 
  a 
  respectable 
  

   and 
  intelligent 
  plumber 
  of 
  this 
  city, 
  to 
  call 
  at 
  his 
  shop 
  in 
  order 
  to 
  see 
  

   a 
  copper 
  reservoir, 
  which 
  had 
  collapsed 
  while 
  apparently 
  subjected 
  to 
  

   internal 
  pressure, 
  arising 
  from 
  a 
  communication 
  with 
  the 
  mains 
  pro- 
  

   ceeding 
  from 
  the 
  public 
  water-works. 
  

  

  For 
  the 
  purpose 
  of 
  refrigerating 
  the 
  contents, 
  the 
  reservoir 
  was 
  

   placed 
  in 
  spring 
  water, 
  at 
  the 
  bottom 
  of 
  a 
  well, 
  so 
  as 
  to 
  be 
  at 
  a 
  small 
  

   depth 
  below 
  the 
  surface 
  : 
  receiving 
  the 
  river 
  water 
  by 
  one 
  pipe, 
  it 
  was 
  

   made 
  to 
  deliver 
  it 
  by 
  another. 
  

  

  The 
  pressure 
  of 
  the 
  water 
  with 
  which 
  the 
  city 
  of 
  Philadelphia 
  is 
  

   supplied, 
  is 
  known 
  to 
  be 
  sufficient, 
  when 
  at 
  its 
  maximum, 
  to 
  com- 
  

   mand 
  the 
  most 
  elevated 
  rooms 
  in 
  our 
  dwellinghouses. 
  Hence, 
  had 
  

   the 
  reservoir 
  been 
  burst, 
  it 
  would 
  not 
  have 
  excited 
  surprise 
  ; 
  but 
  the 
  

   converse 
  appeared 
  inexplicable. 
  The 
  figure 
  on 
  the 
  next 
  page 
  will 
  con- 
  

   vey 
  a 
  correct 
  idea 
  of 
  the 
  reservoir 
  as 
  it 
  appeared 
  when 
  I 
  examined 
  it; 
  or 
  

   subsequently, 
  when 
  a 
  drawing 
  of 
  it 
  was 
  made 
  at 
  the 
  Franklin 
  Institute, 
  

   to 
  which 
  it 
  had 
  been 
  removed, 
  at 
  the 
  instance 
  of 
  some 
  of 
  the 
  members 
  

   of 
  that 
  institution. 
  

  

  