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[[boxed]] 1861 Apr 17 Wedns. [[/boxed]] Observations [[underlined]] Lunar [[/underlined]] ^[[ ([[?]] [[(? for [[?]]] )]] of to-day Apr 17th 1861 [[line across page]] [[Note: four columns separated by lines, horizontal and vertical]] [[column one]] [[strikethrough]] Mean [[/strikethrough]] Time per Chev/ ("G.H.S.") [[double solid line]] h m s 8-10-33 24-46 26-58 31-46 37-49 44-40 [[line]] 6) 185-32 [[line]] h m s 8-30-55.3 [[sun symbol]] Fast 3-08 [[line]] h m s 8-27-47 = G.T. 4-04-55 R.H.T. [[line]] h m s 4-22-52 [[left margin underlined and written vertically]] Mean Time R. Harbor [[/left margin underlined and written vertically]] [[boxed]] App T. Ob. R.H. h m s 4-5-30 Equation - 35 [[line]] h m 4-4-55 [[/boxed]] [[/column one]] [[column two]] Observed Distances . [[sun symbol]] & [[symbol]] N.L. [[double underline]] 84[[degree symbol]] -28[[feet symbol]] 00[[inch symbol]] [[degree symbol]] 30-00 31-45 [[encircled]] A [[/encircled]] [[two lines pointing to following:]] 33-00 35-30 38-00 [[line]] 6) 196-15 [[line]] 84[[degree symbol]] - 32[[feet symbol]] - 42.5[[inch symbol]] Index Error - 1-40 [[line]] [[encircled]] B [[/encircled]] 84[[degree symbol]] - 31[[feet symbol]] - 02[[inch symbol]] [[line]] [[sun symbol]] S Diam 15[[feet symbol]] = 57[[inch symbol]] [[symbol]] S Diam 15[[feet symbol]] - 43[[inch symbol]] [[line]] 85[[degree symbol]] - 02-42 [[line from '85' above pointing to two symbols below]] [[underlined]] Arh a[[?]]ent [[/underlined]] dis. [[sun symbol]] [[symbol]] [[boxed]] Thermometer +16[[degree symbol]] [[/boxed]] [[/column two]] [[column three]] Observed Altitude L.L. [[sun symbol]] Artific. Horiz. [[double underlined]] 54[[degree symbol]] - 24[[feet symbol]] 53-15 52-47 51-55 50-40 49-06 [[line]] 6) 312-07 [[line]] 52[[degree symbol]] -01[[feet symbol]] - 10[[inch symbol]] Ind. Er. - 7[[degree symbol]] -50[[feet symbol]] - 00[[inch symbol]] [[line]] 2) 44[[degree symbol]] - 11[[feet symbol]] -10[[inch symbol]] [[line]] 22-05-35 [[sun symbol]] S. Diam +15[[feet symbol]] - 57[[feet symbol]] [[line]] 22-21-32 Parallex +08 [[line]] 22[[degree symbol]] 21[[feet symbol]] - 40[[inch symbol]] Refraction -2-18 [[line]] [[sun symbol]]'s = | 22[[degree symbol]] - 19[[feet symbol]] - 22[[inch symbol]] Ap Alt | [[encircled]] C [[/encircled]] [[/column three]] [[column four]] Observed Al. [[symbol]] ^[[upper L]] [[underlined and strikethrough]] fartherest [[/underlined and strikethrough]] [[strikethrough]] [[?]] [[/strikethrough]] Ar. Horiz. [[double underlined]] 86[[degree symbol]] - 33[[feet symbol]] 87-17 87-21 88-07 89-03 89-32 [[line]] 6) 527-53 [[line]] 87[[degree symbol]] - 58[[feet symbol]] - 50[[inch symbol]] Index Error +5-00 [[line]] 2) 88[[degree symbol]] - 03[[feet symbol]] - 50[[inch symbol]] [[line]] 44-01-55 [[symbol]] S. Diam - 15[[feet symbol]] - 31[[inch symbol]] [[line]] 43-46-24 Table XV -11[[feet symbol]] [[line]] 43-46-13 Ref. -59 [[line]] [[symbol]]'s } = 43[[degree symbol]] - 45[[feet symbol]] - 14[[inch symbol]] Ap Al } [[/column four]] [[double line across page]] h m s By Astronomical account Apr 17, 1861 = 4-4-55 Longitude by account 65[[degree symbol]] - 05[[feet symbol]] W = 4 .20 - 20 [[line]] [[underlined]] Redicent[[guess]] Time [[/underlined]] (Time G'H") = = 8-25-15 h m s [[line with mid circle]] [[column one]] [[feet symbol]] [[inch symbol]] [[symbol]]'s Semi D Noon 15-27.9 Mid,n 15-34.5 [[line]] Difference ----- 6.6 Tabl XI ----- +5. [[line]] 15-33 Aug Table XI +10 [[line]] [[symbol]]'s Semi D. 15-43[[inch symbol]] [[/column one]] [[column two]] [[feet symbol]] [[inch symbol]] [[symbol]]'s Horiz [[?]]tl Parallax Noon 56-37.6 Midn 57-01.2 [[line]] Observance ----- 24.1 Table XI ----- +17 [[line]] [[symbol]]'s Hor Px = -- 56[[feet symbol]] - 55[[inch symbol]] [[/column two]] [[line with mid circle and vertical line from middle]] [[symbol]] Hor Px. 56[[feet symbol]] - 55[[inch symbol]] Prop Log 0,5000= Same ------ 0,5000 [[sun symbol]] App. Alt 22[[degree symbol]] - 10[[feet symbol]] - 22[[inch symbol]] Cosecant[[guess]] 10,4204 [[symbol]]'s Al - 43-45-14 (Ci[[?]]) 10,1601 [[line]] [[sun symbol]] & [[symbol]] Dist Ap. 85[[degree symbol]] - 02[[feet symbol]] - 42[[inch symbol]] Sime 9,9984 = --- Tangent 11,0620 [[line]] [[line]] 1st Correction 4[[degree symbol]] - 38[[feet symbol]] - 13[[inch symbol]] Table X4VII = 0,9188 { Table X4VII } = 1,7221 2d " [[ditto for: Correction]] 5-03-25 ------------ { 2d Cor. } = 5[[degree symbol]] - 3[[feet symbol]] - 25[[inch symbol]] 3d " [[ditto for: Correction]] -02-01 [[line]] 94-46-26 -10-00 00 [[line]] Table "[[?.]]" 84-46-26 -05 [[line]] True } = | 84-46-21 Dis. [[sun symbol]] & [[symbol]] } [[line]] | True Dist. ) 84-46-21 | Dis. N. A. 83-35-07 Prop Log 3012 [[line]] | 1[[degree symbol]] - 11[[feet symbol]] -14[[inch symbol]] " " [[dittos for: Prop Log]] 4026 | [[line]] [[line]] | 2h-22m-32s [[?]] " " [[dittos for: Prop Log]] 1014 | Add Hours of NA6h - 00m-00 [[encircled]] symbol No2 [[/encircled]] [[line]] Mean Time at Greenwich = 8h-22m-32s " " " [[dittos for: Mean Time at]] Rescue Hr - 4h-04m-55s [[line]] { Difference is } = 4-17-37 = [[encircled]] 64[[degree symbol]] -24[[feet symbol]] - 15[[inch symbol]] W. of Greenwich [[/encircled]] { Longitude in Time} [[end page]] [[start page]] [[boxed]] 1861 Apr 17 Wedns. [[/boxed]] I observed the distances of [[sun symbol]] & [[symbol]] with my "Resolute" Sextant, except the 4th (A) which was with my [[underlined]] pocket [[/underlined]] sextant, [[underlined]] without any Index Errors. [[/underlined]] The Error of the former, being -2[[feet symbol]] (subtraction - [[underlined]] 'On 33[[feet symbol]] - 30-^[[?]] off 29[[feet symbol - 30[[inch symbol]] [[/underlined]] = '2/4[[inch symbol]] = -2[[feet symbol]]) took the same (- 2[[feet symbol]]) out as follows: 84[[degree symbol]] = 28[[feet symbol]]-00[[inch symbol]]-2 = 84[[degree symbol]] -26[[feet symbol]]-00[[inch symbol]] 30-00-2 = 28-00 31-45-2 = 29-34 [[encircled]] [[?]] [[/encircled]] [[encircled]] 154[[guess]] [[/encircled]] [[encircled]] Pocket Sextant no Index er. [[/encircled]] = 33-00= 33-00 35-30-2 = 33-30 38-00-2 = 36-00 [[line]] 6) 186-15 [[line]] 84[[degree symbol]] -31[[feet symbol]] -02.5[[inch symbol]] which is = ^[[(Equivalent to)]] - 1[[feet symbol]] 40[[inch symbol]], subtractive from the [[underlined]] Mean of the whole [[/underlined]] [[encircled]] B [[/encircled]] in the column, "Observed distances [[sun symbol]] & [[symbol]]". [[line across page with circle in middle]] By a portion of the Observations ^[[taken to-day]] I find Apparent & Mean Time thus: - [[encircled]] Vide [[encircled]] C [[/encircled]] in 3d small column ante [[/encircled]] [[Note: Note encircled above has points to first line of observation notes following]] [[sun symbol]]'s - Alt. 22[[degree symbol]] - 19[[feet symbol]] -22[[inch symbol]] Lat N. 62-52 = 62-52-00 Secant 0.34098 Polar Dist 79-18-26 Cosecant 0.00763 [[Note: dotted line from 79 above to 79 below right]] [[line]] 2) 164-29-48 [[line]] 82-14-54 Cosine 9.12994 22-19-22 [[line]] 59-55-32 Sine 9.93721 [[line]] 2)| 9.41576 [[line]] [[boxed to right]] Dec. 10[[degree symbol]] = 34[[feet symbol]] -17.5[[inch symbol]] +7-166 [[line]] Cor Dec[[?]] 10[[degree symbol]] -41[[feet symbol]] -34[[inch symbol]] 90-00-00 [[line]] 79-18-26 = P.D. [[/boxed]] h m s Apparent time } 4-05-30 = Sine = 9.70788 Of Ob. R. Harbor } = ---- 35s Equation sub. [[image]] [[line]] Mean Time } = 4h-04m-55s R. Harbor} [[five lines with mid circles across page]] Compared Chronometers on making Lunar observations to-day: h m s [[underlined]] "Rescue" [[/underlined]] Chro. = 9-43-30 [[underlined]] "George Henry" [[/underlined]] + 9-32-50 [[line]] 10m-40s [[three lines with mid circles across page]] Compared the same Chro's on the 10th Apr [[strikethrough]] [[?]] [[/strikethrough]] 21-39-20 h m s "Rescues" = [[strikethrough]] 23 [[/strikethrough]] = 11=39-20 "George H;s" = 11-28-58 [[line]] 10-28 m & s (Matter of Chronometers continued over)