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[[By far the hardest to read and hardest to transcribe page in the journal, due to crowding, bleed-through ink, etc. Researchers should double check every entry for accuracy]]
[[boxed date]]
1862
Aug
18
Mond
[[/boxed date]]
The Alt of [[sun symbol]] (45°-11') [[strikethrough]]?[[/strikethrough]] on predeeding page of Luna Obs. I took & worked up for Times thus:
[[note in left margin]]
[[sun symbol]] S.D.
Px
[[/note in left margin]]
[[three columns of figures, not clear whether or how related, therefore transcribed individually]]
[[first column]]
45°-11'-00
15 -31
27
__________
45 -26 -58
56
__________
45 -26 -02
3 -25
__________
45 -22 -37 [[connected by a line to the first number in the next column "45°-26.6]]
[[/first column]]
[[second column]]
45°-22.6
51 -26
76 -54.3
________
2)173 -42.9
_________
86 -51.4
45 -22.6
________
41 -28.8
[[/second column]]
[[third column]]
.20582 [[may relate to 51-26 in second column]]
.01144 [[may relate to 76-54.3 in second column]]
8.73905 [[may relate to 86-51.4 in second column]]
9.82109 [[may relate to 41-28.8 in second column]]
________
2)18.77680
________
9.38840
[[the following in right half of page apparently relating to column three]]
10-6-45
+3.39 Equation
_______
[[?A]] 10-10-24 Mean Time Ship
12
________
M.T. Aug d17-h22 10-24 M.T. Ship
[[/the following in right half of page apparently relating to column three]]
[[wavy line across page]]
[[left one-third of page]]
Meridian Observations
Observed [[strikethrough]]Ob[[/strikethrough]] Alt.
of sun 51°-36-30
[[sun symbol]] S.D. 15-51
Px - - - - 7
_________
51 -52-28
[[?Ref]] - - - - 45
_________
51 -48-18
Dif - - - - 3-25
_________
[[sun symbol]]
true Alt - - - - 51 -48-18
90 -00-00
_________
Polar Dist + 38 -11-42
[[?Declination]]+13 -04-19
_________
Latitude = 51°-16'-01"
[[line]]
[[\left one-third of page]]
[[right two-thirds of page]]
Long of place where I took Alt obs ("Lunar") 53-58-15
Diff Long from time AM obs to noon 10-23
________
Long. at Meridian - place of obs for Latitude = 53-47-52
Difference Longitude from noon obs to P.M. obs 13-38
________
Long. [as observed from "Lunar" Obs.]at time = 53-3-14
taking P.M. Obs as below = 53-34-14 [[wavy line and dotted line leading down page to third line from bottom of page to the number "53°-40'-45"]]
[[notations in left 1/3 of page below "Meridian Observations"]]
Lat. Noon obs. - - - 51°-16'
Dif. Lat - - - - - - +10
______
Lat A.M. Obs. = 51°-26
Course & distance from
place A.M. Obs to place
Meridional Obs to
S. 33° E. (True), 12 Miles
[[line]]
Lat. Noon - - - 51-16-00
Dif. Lat. - - - 13-38
________
Lat. place P.M. obs 51-02-22
Course I Distance from place
Noon Obs. [[strikethrough]] to place noon
obs. [[/strikethrough]] to place P.M. Obs
S. 33 E. (True) of 6 1.2 Miles
[[line]]
[[/left one-third of page]]
[[right two thirds of page]]
Time taking P.M. obs.
VI-59-09 35°-17'-00"
VII-00-00 8 10
VII-00-49 2 -30
_________ __________
VI-59-59 35 -09 -10
Chro Fast 6-16 15 -51
________ 8
VI-53-43 __________
3-19-00 35 -25 -09
________ 1 -19
3-34-43] __________
] 35 -23 -10
]
53°-40'-45"]= 3 -35
Long W.____] __________
35 -20 -15]
35 -20.2 ]
51 -02.4 ] .20150
76 -58.4 ] .01132
________
2)163 -21.0
_________
81 -40.5 9.26073
35 -20.2
________
46 -20,3 9.85940
________
2)19,23295
________
3-15 24 = 9.61647
Eq. 3.36
_______
3-19-00
Long. by Chro. - - - - - - - -53°-40'-45" [[underlined and connected by a line & dotted line to the same number top part of page, and by dotted line up to the same number in this section]]
[[boxed note at bottom of page]]
Difference bet. "Lunar" }= 6'-31"
reduced to place of ship (T. of PM obs)}
to Long. by Chro at h3-m19 PM }
[[end page]]
]]start page]]
Thursday Aug. 21, 1862
Last evening Capt. B. being anxious to know the Lat of the ship by observation, I proposed that Altitudes of some of the Stars or Planets be taken & I would work up the obs - There had been no observation ^[[ on 20th)]] of the [[sun symbol]] at Meridian, on a/c thick weather. - With an indistinct horizon, observation of the North Star was taken. I worked up the problem & found the result [[strikethrough]] such that [[/strikethrough]] unreliable on a/c of it placing the vessel too far N. The horizon caused the [[?conjechord]] error. [[bracketed note in margin]] Tried other stars ^[[ but too dark for]] horizon. [[/bracketed note in margin]]
On retiring, I told Capt. B. that if I could be called at 3 AM, I would see what I [[strikethrough]] could [[/strikethrough]] do toward determining Lat. by obsn. of Mars [[mars symbol]] as it passed the Meridian ^[[encircled A]] - & also by Obs of [[Mars symbol]] & [[Moon symbol]] ^[[encircled B]] = their altitudes being [[underlined]] rather at same instant. [[/underlined]] Below are the observations & the working up; -
(1st obsn of [[Mars symbol] Merin. Alt)
[[two columns, unclear if/how they relate]]
[[left column]]
Astronomical Time
20th-19th
h7-00-17 44°-36' Alt [[Mars symbol]]
GH Chro F. G.T. 6-17 Sub -4
________ ______
G.T.= 6-54-00 44 -32-00'
18TH Correction + 6-12
_________
True Alt = 44 -38-12
90 -00-00
_________
Polar Dist 34 -27-48
[[?Dec]]
[[Mars symbol]] [[?]]
[[Encircled A]] Lat Ship = [[encircled 48°-11'-53"]]
[[line]]
20th Aug (Observe [[mars symbol]] & [[Moon symbol]])
(2d set obs)
20h m s
VIII-09-49 =s [[Mars symbol]] 41°-36' = obsd Alt
Fast 6-17 ( [[Moon symbol]] 32°-39' = obsd Alt.
___________
20h -03-32
D.R.A. = h6-m46-s17 Dec. 21°-28'-55" N
[[Mars symbol]] R.A. = 1- 14- 13 Dec. 2 -5- -10 N
__________
5 -32 -04
[[Mars symbol]] Alt. 41°-32' [[bracketed note]] 41°-26' minus 4' = 41 -32 [[/bracketed note]]
[[Moon symbol]] Alt. 33°-35'
(over)
[[/left column]]
[[right column]]
[[Mars symbol passed Meridian
Greenwich [[strikethrough]] ?now [[/strikethrough]] h15-m17
[[line]]
Say at XII ^[[h0]] passed Meridian
Ship 20th Aug ^[[ Ship Time At 15-16
Long. 51° by a/c place of} 3-24
ship Ts of Obsn in T } _____
[[Mars symbol passed Merid
Greenwich T. = h18-m40
[[strikethrough]] Time [[/strikethough]] Greenwich Time by]
Chro [corrected rate \] at moment of obsn for Alt. ]
18- 54
______
[[Mars symbol]] passed Meridian] m14
before Obsn for ^[[ its ]] Alt ]
14 x 14 =196
Table XXXII = x 1".9
______
60)372.4
_____
+6'-12" [[connected by dotted line up the page, left column to "Correction 6-12]]
[[/right column]]
[[/two columns]]
[[end of page]]
Transcription Notes:
By far the hardest to read and hardest to transcribe page in the journal, due to crowding, bleed-through ink, etc. Researchers should double check every entry for accuracy. In some cases I have transcribed for mathematical clarity and/or continuity rather than transcribing text literally which would confuse context if transcribed purely by SI rules.
