﻿346 
  

  

  ON 
  THE 
  DIFFERENCE 
  OF 
  LONGITUDE, 
  ETC. 
  

  

  Elements 
  employed 
  in 
  Calculating 
  the 
  Difference 
  of 
  Longitude, 
  from 
  Observations 
  of 
  the 
  

  

  Solar 
  Eclipse 
  of 
  Nov. 
  30th, 
  1834. 
  

  

  Place 
  of 
  Observation. 
  

  

  Latitude. 
  

  

  Commencement. 
  

  

  End. 
  

  

  o 
  

   o 
  

   o, 
  

  

  DO 
  

  

  <o 
  

  

  M 
  

  

  - 
  - 
  

  

  3 
  

   "8 
  5- 
  

  

  Jj 
  

  

  3 
  

   o 
  

  

  s 
  

  

  Philadelphia, 
  University 
  of 
  Pennsyl. 
  

   University 
  of 
  Virginia. 
  

   Cincinnati 
  Female 
  Academy. 
  

   Baltimore, 
  1 
  mile 
  west 
  of 
  Battle 
  Mon. 
  

   West 
  Hills, 
  Long 
  Island. 
  

   Norfolk, 
  Virginia. 
  

   University 
  of 
  Nashville. 
  

  

  39° 
  57 
  01" 
  

  

  38 
  02 
  03 
  

  

  39 
  06 
  00 
  

  

  39 
  17 
  12 
  

  

  40 
  48 
  47.1 
  

   36 
  51 
  10 
  

   36 
  09 
  32.7 
  

  

  h. 
  m. 
  s. 
  

   1 
  00 
  09.1 
  

   41 
  11.0 
  

   03 
  39.71 
  

  

  51 
  58 
  

  

  1 
  09 
  53.44 
  

   55 
  54.6 
  

   not 
  observed. 
  

  

  h. 
  

   3 
  

   3 
  

   2 
  

   3 
  

   3 
  

   3 
  

   q 
  

  

  m. 
  s. 
  

   37 
  50.1 
  

   23 
  43 
  

   49 
  39.71 
  

   31 
  29.5 
  

   45 
  18.55 
  

   37 
  02.1 
  

   41 
  45.2 
  

  

  1 
  

  

  Results 
  obtained 
  by 
  assuming 
  Irradiation 
  and 
  Inflexion 
  = 
  3". 
  3. 
  

  

  

  

  W~ 
  of 
  Observation. 
  J^s^ct. 
  

  

  Time 
  of 
  Conj. 
  

  

  -Mean 
  of 
  Times 
  

  

  Difference 
  of 
  

  

  Longitude 
  

  

  from 
  olis.of 
  end. 
  

  

  ofCoDJunction. 
  

  

  Longitude. 
  

  

  from 
  Greenw. 
  

  

  

  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  Philad. 
  reduced 
  to 
  State 
  House. 
  

  

  1 
  47 
  05.87 
  

  

  1 
  47 
  05.35 
  

  

  1 
  47 
  05.61 
  

  

  00 
  00.00 
  w. 
  

  

  5 
  00 
  43.90 
  

  

  University 
  of 
  Virginia. 
  

  

  1 
  33 
  42.04 
  

  

  1 
  33 
  47.21 
  

  

  1 
  33 
  44.62 
  

  

  13 
  20.99 
  W. 
  

  

  5 
  14 
  04.89 
  

  

  Cincinnati 
  Female 
  Academy. 
  

  

  1 
  09 
  38.00 
  

  

  1 
  09 
  38.07 
  

  

  1 
  09 
  38.33 
  

  

  37 
  27.28 
  W. 
  

  

  5 
  38 
  11.18 
  

  

  Bait, 
  reduced 
  to 
  Battle 
  Monu. 
  

  

  1 
  41 
  25 
  79 
  

  

  1 
  41 
  22.54 
  

  

  1 
  41 
  24.16 
  

  

  5 
  41.45 
  W. 
  

  

  5 
  06 
  25.35 
  

  

  West 
  Hills, 
  Long 
  Island. 
  

  

  1 
  54 
  02.12 
  

  

  1 
  54 
  04.96 
  

  

  1 
  54 
  03.54 
  

  

  6 
  57.93 
  E. 
  

  

  4 
  53 
  45.97 
  1 
  

  

  Norfolk, 
  Virginia. 
  1 
  42 
  41.71 
  

  

  1 
  42 
  37.29 
  

  

  1 
  42 
  39.50 
  

  

  4 
  26.11 
  W. 
  

  

  5 
  05 
  10.01 
  

  

  University 
  of 
  Nashville. 
  com.notobs. 
  

  

  1 
  00 
  44.36 
  

  

  1 
  00 
  44.36 
  

  

  46 
  20.99 
  W. 
  

  

  5 
  47 
  04.89' 
  

  

  Results 
  obtained 
  by 
  neglecting 
  Irradiation 
  and 
  Inflexion. 
  

  

  Piace 
  of 
  Observation. 
  

  

  Time 
  of 
  Conj. 
  1 
  Time 
  of 
  Conj. 
  

  

  Mean 
  of 
  Times 
  

  

  Difference 
  

  

  Longitude 
  

  

  lr.&In. 
  

  

  from 
  ob. 
  of 
  com. 
  from 
  ob. 
  of 
  end. 
  

  

  of 
  Conjunction. 
  

  

  of 
  Longitude. 
  

  

  from 
  Greenw. 
  

  

  from 
  du. 
  

  

  

  h. 
  m. 
  s. 
  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  h. 
  m. 
  s. 
  

  

  

  Philadelphia, 
  State 
  House. 
  

  

  1 
  47 
  11.64 
  1 
  46 
  59.49 
  

  

  1 
  47 
  05.56 
  

  

  00 
  00.00 
  W. 
  

  

  5 
  00 
  43.90 
  

  

  3".5 
  

  

  University 
  of 
  Virginia. 
  

  

  1 
  33 
  47.83 
  1 
  33 
  41.37 
  

  

  1 
  33 
  44.60 
  

  

  13 
  20.90 
  W. 
  

  

  5 
  14 
  04.86 
  

  

  1 
  .5 
  

  

  Cincinnati 
  Female 
  Acad. 
  

  

  1 
  09 
  44.40 
  1 
  09 
  32.18 
  

  

  1 
  09 
  38.29 
  

  

  37 
  27.27 
  W. 
  

  

  5 
  38 
  11.17 
  

  

  3 
  .5 
  

  

  Bait. 
  Battle 
  Monument. 
  

  

  1 
  41 
  31.56 
  1 
  41 
  16.69 
  

  

  1 
  41 
  24.12 
  

  

  5 
  41.44 
  W. 
  

  

  5 
  06 
  25.34 
  

  

  4 
  .2 
  

  

  West 
  Hills, 
  Long 
  Island. 
  

  

  1 
  54 
  07.90 
  1 
  53 
  59.09 
  

  

  ] 
  53 
  03.49 
  

  

  6 
  57.93 
  E. 
  

  

  4 
  53 
  45.97 
  

  

  2 
  .5 
  

  

  Norfolk, 
  Virginia. 
  

  

  1 
  42 
  47.48 
  1 
  42 
  31.47 
  

  

  1 
  42 
  39.47 
  

  

  4 
  26.09 
  W. 
  

  

  5 
  05 
  09.99 
  

  

  4 
  .6 
  

  

  University 
  of 
  Nashville. 
  

  

  | 
  1 
  00 
  38.47 
  

  

  1 
  00 
  38.47 
  

  

  46 
  21.02 
  W. 
  

  

  5 
  47 
  04.92 
  

  

  

  By 
  comparing 
  the 
  results 
  furnished 
  by 
  these 
  two 
  tables 
  it 
  will 
  be. 
  

   seen 
  that 
  although 
  the 
  times 
  of 
  conjunction 
  deduced 
  either 
  from 
  the 
  

   commencement 
  or 
  end, 
  when 
  the 
  correction 
  for 
  irradiation 
  and 
  inflexion 
  

   is 
  applied, 
  diners 
  considerably 
  from 
  that 
  obtained 
  when 
  this 
  correction 
  

   is 
  neglected, 
  yet 
  the 
  mean 
  of 
  the 
  times 
  of 
  conjunction 
  in 
  the 
  former 
  

   case 
  differs 
  almost 
  imperceptibly 
  from 
  that 
  in 
  the 
  latter, 
  and 
  the 
  

   differences 
  of 
  longitude 
  resulting 
  from 
  the 
  two 
  methods 
  of 
  calculation 
  

   are 
  almost 
  identical. 
  

  

  