Table II. 



CALCULATION FOB FINDING 



THE LATITUDE PROM OBSERVATIOKS MADE NEAE NOON WITH THE REPEATING REFLECTING CIRCLE. 



TBOUGHTON's ClECLE. 



11.50' 24" .3 



Noon by Chronometer. 



Instrument .ntHSriCSe"] 



11 51 37.5 



61 595 



62 26.7 

 62 45.5 

 £3 18.5 

 68 48.6 



54 16.5 

 64 39.5 



55 11.5 

 55 36.5 



1 132 



1 35.2 



2 2.4 

 » 21.2 

 S 64.2 



3 24.2 



3 52.2 



4 15.2 



4 47.2 



5 12.2 



31 37.2 



3.93 

 494 

 8.17 

 10.87 

 1655 

 22.74 

 29.41 

 35.52 

 44.98 

 53.16 



229.27 



1st Repetition [592' 1' .5"] 



404.38 1st compound series. 

 137453 



1778.91 2d compound series. 



2d Repetition [806*38'40"1 



83 02.6 1374.53 3d Repetition [SO' 49' 24'] 



Suns declination, 

 Refraction — ParaJlax, 

 Correction of declination, 

 Reduction to Meridian, 



Corrected declination, 



: 17- .58' 7' 

 2 14.40 

 1.16 

 11.45 



17 56 2.99 



17° 58' 7" 

 — 2 14.30 

 + 2.11 



+ 1498 



17 56 9.79 



Sun's declination, Cos. 17' 58' 07* 

 Log. Co. Lat. 50 19 57 



Constant Factor, 

 Ar. Co. sin. zcn. Distances, 

 Log. 176.11 



167' 20' 26" 

 692 01 05 



99782836 

 ; 980.50461 



= 9.7833297 

 ^ 0.03202*6 

 = 2.2433109 



2.0586652 

 ,'= [ 1146 



9.7833J97 

 0.0819667 

 2,3603472 



2.1756436 

 ,', [ 149,8 



U".98 



692* 01' 06" 

 720 + 306 38 40 



If ISth November 1817. 



Quicksilver. 



Horizon. 



Thermometer = ITS = 9.9980__,„9998o 



Barometer 74875 = 9.9933- 9.9933 



Z. Dist. 68'- = 2.1661 2.156] 



16 = 68' 17".6 = 64 



Altitudes, 

 Z. Distance, 

 Declination, 



Latitudes, 



20 [434 40 39 



21 44 1.95 

 68 15 68.05 

 17 66 2.29 



60 19 65.76 



[434 .37 35 



21 43 59.75 

 68 16 0725 

 17 56 9,79 



50 19 57.46 



j', [58.9 difference. 



1.96 Corr. for 5th series. 



17- 58' 7" 

 — 2 14.30 

 + S.64 



+ 1 29.81 



17 66 28.05 



17=58' 07" 

 — 2 14.30 

 + .17 



+ 1319 



17 56 6.06 



17° 58' 07" 

 — 2 14.3 

 + 1.96 



+ 38.76 



17 66 3342 



.1374.53 



9.7838297 

 0.0319491 

 9.I38164S 



2.9534330 

 ,•5 [ 8981 



I' 29" 81 



306° 38' 40" 

 720 + 20 49 24 



,>, [434 10 44 



21 42 32.2 

 68 17 27.8 

 17 66 28.06 



9.7883297 

 0.0310204 

 2.6067S97 



2,4211398 

 A [263.9 



13".19 



167° 20 26- 

 720 + 306 38 40 



A [869 18 14 



.1778.91 



9.7833207 

 0.0319969 

 3.2501639 



60 19 68.76 



3,0654805 

 ,'t [1162.7 



38''.76 



15r20'26' 

 1440 + 20 49 24 



,'5 [1307 28 58 



50 19 66.59 

 N. a. In the preceding calculations, the Centigrade Thermometer and the Metrical Barometer are employed. 



50 19 57,61 



