﻿CONTENTS. 
  XV 
  

  

  ARTICLE 
  XXIII. 
  

   Of 
  an 
  Improved 
  Barometer 
  Gage 
  Eudiometer. 
  By 
  R. 
  Hare, 
  M.D., 
  &c, 
  &c, 
  &c. 
  - 
  389 
  

  

  ARTICLE 
  XXIV. 
  

  

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

  

  great 
  Pressure 
  from 
  a 
  Head 
  of 
  Water. 
  By 
  R. 
  Hare, 
  M.D., 
  &c, 
  &c, 
  &c. 
  - 
  395 
  

  

  ARTICLE 
  XXV. 
  

  

  Sundry 
  Improvements 
  in 
  Apparatus, 
  or 
  Manipulation. 
  By 
  R. 
  Hare, 
  M.D., 
  &c, 
  

  

  &c, 
  &c. 
  . 
  .'.- 
  - 
  - 
  - 
  - 
  - 
  - 
  - 
  - 
  399 
  

  

  ARTICLE 
  XXVI. 
  

  

  Notes 
  and 
  Diagrams, 
  illustrative 
  of 
  the 
  Directions 
  of 
  the 
  Forces 
  acting 
  at 
  and 
  near 
  the 
  

   surface 
  of 
  the 
  Earth, 
  in 
  different 
  parts 
  of 
  the 
  Brunswick 
  Tornado 
  of 
  June 
  19th 
  1835. 
  

   By 
  A. 
  D. 
  Bache, 
  Professor 
  of 
  Natural 
  Philosophy 
  and 
  Chemistry 
  in 
  the 
  University 
  

   of 
  Pennsylvania 
  ; 
  one 
  of 
  the 
  Secretaries 
  of 
  the 
  American 
  Philosophical 
  Society. 
  - 
  407 
  

  

  ARTICLE 
  XXVII. 
  

  

  Deductions 
  from 
  Observations 
  made, 
  and 
  Facts 
  collected 
  on 
  the 
  Path 
  of 
  the 
  Bruns- 
  

   wick 
  Spout 
  of 
  June 
  19th 
  1835. 
  By 
  James 
  P. 
  Espy, 
  Member 
  of 
  the 
  American 
  

   Philosophical 
  Society. 
  - 
  - 
  - 
  - 
  - 
  - 
  - 
  - 
  421 
  

  

  ARTICLE 
  XXVIII. 
  

  

  On 
  the 
  Relative 
  Horizontal 
  Intensities 
  of 
  Terrestrial 
  Magnetism 
  at 
  several 
  Places 
  in 
  

   the 
  United 
  States, 
  with 
  the 
  Investigation 
  of 
  Corrections 
  for 
  Temperature, 
  and 
  Com- 
  

   parisons 
  of 
  the 
  Methods 
  of 
  Oscillation 
  in 
  Full 
  and 
  Rarefied 
  Air. 
  By 
  A. 
  D. 
  Bache, 
  

   Professor 
  of 
  Natural 
  Philosophy 
  and 
  Chemistry, 
  and 
  Edward 
  H. 
  Courtenay, 
  Pro- 
  

   fessor 
  of 
  Mathematics, 
  in 
  the 
  University 
  of 
  Pennsylvania. 
  - 
  - 
  - 
  427 
  

  

  