Table I. 



C Vol. IX. Part /.—p. 233J 



Lircum-mendiiui Observations made at Makerstown, 9lli February 1820, in order to determine U]e Latitude, and ifitli a view of .iscertaining the Aceumcy that may be obtained by that llode o! Obscrvine.— Longitude '" Tinie West of Greenwich, nearly W.V. Quicksilver Horizon, covered by one of Troughton's 

 Glass Roofk 



Mean, 55 34 14.2 



Log/^ 



Co-sine H Co-sine D 

 Smc (H -I- D) 



FormiUa for Logy 

 H 65 34 32 Co-sine 9.76S29 

 D 14 64 61 Co-sine 998512 



H -^ D = 70 29 33 Ar. Co-sine 0.02568 



O deehnation at noon Ephemeris, 

 10° 4" west of Greenwich, 



Deehnation corrected for different meridians, 14 54 51.5 

 For the refraction. 



Barometer, 

 Thermometer, 

 Zenith distance, 



2940 = 0.7469 = 

 47 8.33 : 



70 



42.7 



9.9923 



0.0027 



2.2009 



70 



Refraction, 

 Parallax, 



2.2129 

 — 163.3 



554.9 



_ 2 34.9 



Semi-diameter, + 16 14.0 



Correction, -(- 13 891 



Numbers corresponding to horary angles, 

 Logarithms, - . . 



Constant factor, or Log.y 



Constant factor + Log. of nttmbers. 

 Corrections, - - . 



©'s declination corrected for diiferent meridians. 

 Corrections for horary angles, 



D correction, 



Altitudes corrected for error of instrument, 

 Semi-diameter -J- Parallax — Refraction 

 Refraction to noon, 



Co-latttudes, or height of equator, 



Latitudes, . . . 



149.17 

 2.17363 

 976309 



1.93677 

 + 86.4 



: 14 64 51.5 

 + 7.0 



-I- 14 54 58.5 

 -(- 19 15 35.0 

 -1- 13 391 

 + 1 26.4 



34 25 39.0 

 56 34 21.0 



100.37 



2.00160 



9.76309 



1.76469 

 68.3 



14 54 51.5 

 -I- 5.7 



14 51 67.2 

 16 lOO 

 13 391 



58,2 



25 44.5 

 34 155 



14 64 53.8 



16 30.0 



13 391 



32.6 



25 37.5 

 34 22.5 



39,17 25,68 



1.59295 1.40960 



9.76309 976309 



1.35604 1.17269 



22.7 14.9 



3.6 



14 54 55.1 



16 6O0 



13 391 



22.7 



26 46.9 

 34 13.1 



14 54 544 



17 OOO 



13 39.1 



14.9 



25 48.4 

 34 11.6 



11.63 

 1.06558 

 9.76309 



0.82867 

 6.7 



14 54 51,5 14 54 51.5 

 -h 2.9 



25 54.3 

 34 068 



3.15 

 3.49831 

 D.76309 



0.261 40 

 1.8 



tt 64 51.5 

 1.0 



1154 52.5 

 17 20 

 13 391 

 1.8 



25 63.1 

 34 0a6 



0.59 

 9.77085 

 976309 



953394 

 0.8 



14 5451.5 

 — 19 



14 54 496 

 17 5 

 18391 

 6.6 



2J397 

 34 203 



21.82 4095 



1.33885 1.61223 



9.76309 976309 



1.10194 1.37534 



12.6 23.7 



14 54 51.6 

 — 2.7 



14 54 48.8 

 17 00 

 13 391 

 12.6 



26 40,5 

 34 195 



14 54 61,5 

 — 3,6 



14 54 47,9 



16 55,0 



13 391 



23,7 



25 45,7 

 34 14.3 



6011 83.81 



1.77895 1,92330 



976309 9,76309 



1,64204 

 34.8 



14 54 51 5 



— 4.4 



14 54 47.1 



16 4.3.0 



13 39.1 



34.8 



25 460 

 34 140 



48.6 



108,97 

 2.03731 

 976309 



1.80040 

 63.3 



14 64 61.5 

 — 5.9 



14 54 45,6 



16 25,0 



13 391 



1 3.2 



23 52.9 

 34 07.1 



140.18 

 2.14669 

 976309 



1.90978 

 81.2 



14 54 51.5 

 _ 6.8 



14 54 44.7 

 16 00-0 

 13 391 

 121.2 



25 46.0 

 34 16.0 



Mean of 17 Latiiades = 55 34 14,2 . 



NoU. * H becomes — D when the Sun or Star is North i.f the Equator 



