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    Lunar Eclipse
    From: Ken Muldrew
    Date: 2004 Oct 27, 14:35 -0600

    In honour of tonight's lunar eclipse, I've copied in a longitude by lunar
    eclipse by Peter Fidler, Hudson's Bay Company surveyor, from 1808. Fidler
    was on a journey from the Swan River to Red River and stopped over for 5
    days in Brandon House (near the current city of Brandon Manitoba) where he
    took these observations. In the transcription, "D. Alt." means a meridian
    altitude of the sun through an artificial horizon, "(.)" means the sun,
    and "))" is for the moon. The observations are not recorded in
    chronological order as this is a fair copy of his field journal (a copy
    made after the fact, cleaning up any useless information). The eclipse
    data comes first, then a series of latitudes, compass variation, some time
    shots, and two lunars (with almanac data below). Fidler clears his lunars
    using Witchell's method (the corrections are given below the almanac data)
    but sadly he left no trace of his workings in any of his notebooks.
    
    Astronomical Observations taken at Brandon House 1808
    Peter Fidler
    
    Lunar Eclipse                  Watch
    May 9th                     Beg      | End
                              | #  '     | #  '
    Beginning . . . . . . . . | 11.1     | 14.32
    Black spot below  . . . . | 11.6     | 13.39
    Bright spot above - near
                   the middle | 11.8 1/2 | 13.43
    Like Tycho near UL  . . . | 11.18 1/2| 13.52 1/4
    A black spot on E side
                      on left | 11.29    | 14.3
    Tycho, middle near ))'s UL| 11.36    | Forgot the
    Begin^g Total Darkness  . | 11.59 1/2|
    End Total Darkness  . . . | 13.33
    A spot not marked above . | 13.35
    A Bright spot near the middle - the left one
     of the two close together| 14.7
    End of Eclipse  . . . . . | 14.32
    End of Penumbra . . . . . | 14.37
    
    Long^de by Beginning        99..41 1/4
      Beg. Tot^l Darkness       99..35 1/2
      End Tot^l Darkness        99..29
      End of Eclipse            99..14
                               -----------
                   Mean         99.29.56
    2^nd Obs.                  -----------
                                 ?  '  "
    Mean of all . . . . . . . . 99.25.5
         of Lat^de  . . . . . . 49.40.43
    
    Very clear calm night, the moon red, but still visible - very
    good sight from beginning to the end.
    N.B. The Mandan Village at the Missouri is said to bear about SSE
    from River Qu'Appelle House - and to W of S from Brandon House.
    
    May 9  D Alt. | Lat
          (.)  LL |
          ?  '  " |
         115.3.30 |
         -     15 |
        --------------------
         115.3.15 | 49.40.29
    
    May 10 D Alt.  | Lat
          (.)  LL  |
          ?  '  "  |
         115.34.0  |
         -      15 |
        --------------------
         115.33.45 | 49.40.57
    
    May 11 D Alt. | Lat
          (.)  LL |
          ?  '  " |
         116.5.30 |
         -     15 |
        --------------------
         115.5.15 | 49.40.42
    
    May 9  D Alt. | (.) bore
     #4 1/4 (.) LL
          56.19.0 | S70? 1/2 W
             27.0 | 71 1/2
          55.55.0 | 72 1/2
         ---------------------
          56.27.0 | S 71 1/2 W
           -    15
         ---------------------
          56.26.45| Variat E
                    12?..12"
    
    May 9  #  '  " | (.) LL
           4.16.17 | 54.52.30
             17. 0 | --.39.15
             17.37 | --.27. 0
           ------------------
           4.16.58 | 54.39.35
           + 14. 8 | -     15
           ------------------
           4.31. 6 | 54.39.20
    
    May 9  #  '  " | (.) LL
          20.41.35 | 83.21. 0
             42.24 | --.34.30
             43.12 | --.48.15
          -------------------
          20.42.24 | 83.34.35
          +  18.40 | -     15
          -------------------
          21. 1. 4 | 83.34.20
    
    May 14 #  '  " | (.) LL
          19. 6.32 | 49.15. 0
              7.21 | --.31. 0
              8. 4 | --.45. 0
          -------------------
          19. 7.19 | 49.30.20
          -     44 | -     15
          -------------------
          19. 6.35 | 49.30. 5
    
    May 14 #  '  " | )) & (.)'s NL
          18.45.54 | 110?23'45"
             47.50 | ---.23. 0
             48.15 |    .22.30
             49.15 |    .22.15
             50. 8 |    .22. 0
             51. 6 |    .21.45
             52. 4 |    .21.15
             52.53 |    .20.45
             53.53 |    .20.30
             54. 7 |    .20.15
         ----------------------
          18.50.32 | 110.21.48
          -     44 | -      15
         ----------------------
          18.49.48 | 110.21.33     99? 24 1/4'
    
    May 14 #  '  " | )) & (.)'s NL
          19. 9.18 | 110?14'45"
             10.38 | ---.14.15
             11.35 |    .14. 0
             12.43 |    .13.30
             13.45 |    .13. 0
             14.41 |    .12.15
             15.36 |    .11.45
             16.33 |    .11.30
             17.25 |    .11.15
             18.24 |    .11. 0
         ----------------------
          19.14. 4 | 110.12.43
          -     44 | -      15
         ----------------------
          19.13.20 | 110.12.28     99? 16 1/4'
    
    (.) TA 22?16' 5"   | 26? 4'40"
        AA 22.18.15    | 26. 6.28
      Semi    15.50    |    15.50
    )) TA  21.41.30    | 19. 3.50
       AA  20.50.40    | 18.12.33
      Semi    15.41    |    15.40
       HP     57. 2    |    57. 1
    +1'14" -29'28" -5" |+1'1" -31'47" -5"
          110.24.45    | 110.13.7
    
    Ken Muldrew.
    
    
    

       
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