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[[boxed]] 1861 Thurs Apr 4 [[/boxed]] P.M. Observations for Time: {Index Error] - 1[[feet symbol]] - 45[[inch symbol]] { Subtraction } h m m 3-25-05 43[[degree symbol]] - 58 30 ' [[ditto for: 3]] 28-05 43 24-30 ' [[ditto for: 3]] 30-15 43-00-00 ' [[ditto for: 3]] 31-50 42-42-00 ' [[ditto for: 3]] 36-05 41-55-00 ' [[ditto for: 3]] 39-40 41-12-00 ' [[ditto for: 3]] 41-15 40-52-30 [[line]] [[line]] 7 | 24-52-15 | 7 | 297-04-30 [[line]] [[line]] [[encircled]] A [[/encircled]] 3h-33m-10.7s 2 | 42[[degree symbol]]-26[[feet symbol]]-21[[inch symbol]] 4 {observed Al. [[sun symbol]] } [[line]] [[sun symbol]]'s Diam. & Pulx.[[guess]] +16-09 16[[feet symbol]]-01[[inch symbol]] + [[?]] " [[ditto for: Pulx[[guess]] ]] [[line]] 21-29-19 Sub. Index Error -1-45 [[right margin line starting at the number '5' above]] [[line]] 21-27-34 -2-24 Refraction [[line]] [[sun symbol]] Center [[underlined]] True [[/underlined]] Altitude 21[[degree symbol]]-25[[feet symbol]]-10[[inch symbol]] Latitude N. 62-51-05 Secant, 34075 Polar Distance 84-04-30 Co.Se[[?]], 00232 [[boxed]] [[sun symbol]]'s Dec Greenwich 5[[degree symbol]]-47-54.8 7-30.1 [[line]] 5-55-25 Corrected]] 10-00-00 [[line]] 84[[degree symbol]]-4[[feet symbol]]-35[[inch symbol]] P. [[?]] [[/boxed]] 2 | 168-20-45 [[line]] 84-10-22 Cosn. 9,00663 21-25-10 [[line]] 62-45-12 Sine 9.94892 h m s 2 | 19.29862 [[line Apparent Time P.M. = 3-31-53 = Sine = 9.64931 Time of Watch 3-33-10.7 [[line]] Watch Fast = 1-17.7 [[underlined]] (one minute, 17 seconds & 7/10th) [[/underlined]] [[/right margin line curving under previous entry ending at left margin]] [[underlined]] (1[[feet symbol]] -45[[inch symbol]] ) "Index Error", Should have been subtracted from the Mean of the Elevations the Sun by Artificial horizon - that is before dividing by 2 (Hall) [[underlined]] [[end page]] [[start page]] [[boxed]] 1861 Thurs Apr 4 [[/boxed]] Noon Observations for Latitude [[column 1]] h m s [[degree symbol]] [[feet symbol]] [[inch symbol]] 11-46-68 (A) 65-17-00 52-00 (B) 65-25-15 55-30 (C) 65-30-00 12-03-10 (D) 65-33-00 5-22 (E) 65-28-00 12-13 (F) 65-23-00 19-40 (G) 65-22-00 23-55 (H) 65-12-00 [[strikethrough]] 26 [[?]] [[/strikethrough]] 26-45 (I) 65-05-30 [[line]] [[strikethrough]] 9 [[/strikethrough]] 9) 588-15-45 [[line]] [[strikethrough]] 2[[?]] [[/strikethrough]] 2) 65[[degree symbol]] - 21[[feet symbol]] - 45[[inch symbol]] [[line]] 32-40-52 Sub. Index Error -1-45 [[line]] 32-39-07 [[sun symbol]]'s Semi D. & Px. +16-09 [[line]] 32-44-16 Sub. Refraction -1-28 [[line]] [[sun symbol]]'s [[underlined]] true [[/underlined]] Alt. 32[[degree symbol]] - 53[[feet symbol]] - 48[[inch symbol]] Correction XXXIIIXXIII = +4-14 [[Note: dotted line from previous entry to same entry in column 2]] [[underlined]] Meridian [[/undelrined]] Alt. 32[[degree symbol]] - 58[[feet symbol]] - 02[[inch symbol]] 90-00 00 [[line]] Zenith Dist. 57-01-58 Dec Corrected 5-52-01.5 [[line]] Lat. N. [[dark underlined]] 62[[degree symbol]] - 53[[feet symbol]] - 59[[inch symbol]].5 [[/dark underlined]] [[boxed]] Error of Nat Sub. Index error before Division by 2 [[Note: line pointing to 52[[inch symbol]] 5]] [[boxed]] [[line]] [[double underlined]] 62-53-07[[inch symbol]] [[/double underlined]] corrected) [[Evidently there is some error in Artificial Horizon on the Instrument as the excess of Latitude is nearly 3 miles over that before determined. I fine the "Index Error" of Sextant to be 1[[feet symbol]] - 45[[inch symbol]] - [[underlined]] subtraction, [[/underlined]] - this changes the In at. nearky 2 miles [[strikethrough]] obser Lat [[?]] 62[[degree symbol]] - 53[[feet symbol]] - 59.5[[inch symbol]] Sub [[?]] [[?]] [[?]] 1-45 [[line]] 62-52-14 62-51-05 [[line]] Difference still 1[[feet symbol]] - 09[[inch symbol]] [[line]] [[/strikethrough]] [[/column 1]] [[column 2]] Mean Alt. [[sun symbol]] by Artificial Horizon [[boxed]] [[column 1 within column 2]] Call Watch. at noon - Times m A) - 15 from Noon B) - 9 ---- C) - 6 ---- D) 2 - 10 --- E) - 4-22 -- F) - 11 - 13 -- G) - 18 - 40 -- H) - 22 - 55 -- I) - 26 - 45 -- [[/column 1 within column 2]] [[column 2 within column 2]] Minute feet Numbers Table XXXIII 225, 81,36 4.7 19.1 125.8 348.0 525.0 715.5 [[line]] 9) 2080.1 [[line]] 231.1 1.1 [[line]] 2311 2311 [[line]] 60) 254,21 240 [[line]] 14[[inch symbol]] [[Note: dotted line pointing from previous entry to following entry]] [[dotted encircled]] 4[[feet symbol]] - 14[[inch symbol]] [[/dotted encircled]] [[column 2 within column 2]] [[boxed]] (I) in small table should have been 25m - 45s instead 26-45 but this error would change result but [[underlined]] trifle [[/underlined]] - Say nearly 6[[inch symbol]] in Lat. [[/boxed]] [[boxed]] The "Index Error" should be subtracted before division by 2 - to correct above I sub 1/2 the Index S[[?]] from Lat. wh. leaves: [[sun symbol]] 2[[degree symbol]] - 53[[feet symbol]] - 07[[inch symbol]] [[/column 2]]