﻿346 
  

  

  MR 
  WILLIAM 
  SWAN 
  ON 
  THE 
  ECLIPSE 
  OF 
  THE 
  SUN, 
  1851. 
  

  

  TABLE 
  II. 
  Observations 
  of 
  Red 
  Prominences 
  and 
  Spots 
  on 
  the 
  Sun. 
  

  

  

  Gbteborg 
  M. 
  T. 
  

  

  Observed 
  angle 
  from 
  

   Sun's 
  vertex. 
  

  

  Calculated 
  angle 
  

  

  from 
  Sun's 
  north 
  

  

  point. 
  

  

  Group 
  of 
  spots, 
  l'-5 
  from 
  Sun's 
  limb, 
  

   Single 
  spot, 
  1' 
  from 
  limb, 
  . 
  

  

  l 
  h 
  37 
  m 
  

   1 
  40 
  

  

  96° 
  30' 
  west. 
  

   62 
  00 
  east. 
  

  

  288° 
  47' 
  

   87 
  17 
  

  

  Hook- 
  shaped 
  red 
  prominence, 
  

   Serrated 
  prominence, 
  

  

  About 
  3 
  58 
  

   About 
  3 
  58 
  

  

  110 
  30 
  west. 
  

   132 
  40 
  west. 
  

  

  282 
  8 
  

   259 
  58 
  

  

  Bright 
  rays 
  in 
  corona, 
  

  

  About 
  3 
  58 
  

  

  28 
  30 
  east. 
  

  

  61 
  8 
  

  

  Table 
  III. 
  Phases 
  of 
  the 
  Eclipse 
  observed 
  by 
  MM. 
  Swan 
  and 
  Lane, 
  

   in 
  Lat. 
  57° 
  42' 
  57"-3 
  N. 
  ; 
  Long. 
  h 
  47 
  ra 
  45^-2 
  E. 
  

  

  First 
  external 
  contact, 
  

  

  Beginning 
  of 
  totality, 
  

  

  End, 
  

  

  Last 
  external 
  contact, 
  

  

  2 
  h 
  53 
  m 
  4 
  s 
  -4 
  About 
  2 
  s 
  late. 
  

  

  3 
  55 
  52 
  -6 
  

  

  3 
  59 
  8 
  -1 
  

  

  4 
  57 
  57 
  -8 
  Probably 
  too 
  late. 
  

  

  Table 
  IV. 
  Phases 
  of 
  the 
  Eclipse 
  observed 
  by 
  Lieutenant 
  Pettersson, 
  in 
  Lat. 
  57° 
  42' 
  6 
  - 
  "2 
  N, 
  

  

  Long. 
  h 
  47 
  m 
  51 
  s 
  E. 
  

  

  First 
  external 
  contact, 
  

  

  Beginning 
  of 
  totality, 
  

  

  End, 
  

  

  Last 
  external 
  contact, 
  

  

  2 
  h 
  53 
  m 
  3 
  s 
  -9 
  

  

  3 
  55 
  58 
  -2 
  Too 
  late. 
  

  

  3 
  59 
  8 
  -2 
  

  

  4 
  58 
  2-6 
  Difficult 
  to 
  observe. 
  

  

  Table 
  V. 
  Thermometrical 
  Observations. 
  

  

  Times. 
  

  

  Dry 
  Ther. 
  

  

  Wet 
  Ther. 
  

  

  

  2 
  h 
  45m 
  

  

  66° 
  

  

  60° 
  

  

  

  2 
  53 
  

  

  

  

  First 
  external 
  contact. 
  

  

  3 
  

  

  64 
  

  

  59 
  

  

  

  3 
  15 
  

  

  62 
  

  

  57-5 
  

  

  

  3 
  30 
  

  

  61 
  

  

  56-6 
  

  

  

  3 
  45 
  

  

  60 
  

  

  57 
  

  

  

  3 
  50 
  

  

  57-8 
  

  

  55-5 
  

  

  

  3 
  56 
  

  

  

  

  Beginning 
  of 
  totality. 
  

  

  3 
  59 
  

  

  

  

  End 
  of 
  totality. 
  

  

  4 
  10 
  

  

  57 
  

  

  55 
  

  

  

  4 
  30 
  

  

  58-5 
  

  

  56 
  

  

  

  4 
  45 
  

  

  60 
  

  

  57 
  

  

  

  4 
  55 
  

  

  62-3 
  

  

  59-5 
  

  

  

  4 
  58 
  

  

  

  ... 
  

  

  Last 
  external 
  contact. 
  

  

  5 
  5 
  

  

  62 
  

  

  58-5 
  

  

  

  5 
  30 
  

  

  62 
  

  

  57-5 
  

  

  

  