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Show [ 243] 140 Encampment on the Sweet ¥Vater river-Continued. DETER1\HNATION OP LON .ITUDE. • Angust 7, 1842.-Altitude of Arcturus . Observat£ous. Double altitude of Time of chronometer. Arctmu . d(cr, min. 5l ~6 50 42 49 54 cr. drg. mill. sec. 20 1:2 ] 02 30 ] 2 20 56 30 12 23 04 Index error = + 25''. Result of calculation. Mean time. Advance. Longitude. h. min. sec. 2 23 3~ h. min. ~ec. 9 57 01 deer. min. sec. 109 51 29 DETERMINATION OF LATITUDE. August 7, 1842.-Altitude of Polaris. ObBerva t·ions. Double altitude of Time of chronometer. Yolari . I fkg. min. ser. h. 84 min. sec. 59 25 5 00 00 " 12 30 38 12 32 19 85 01 20 12 33 25 85 02 30 12 34 57 85 03 20 12 36 2l 85 05 00 12 37 48 Thermometer 36o. Result of calculation. True altitude. Mean time. Latitude. de<r. min. sec. 42 27 15 d.eg. rni11. src. 42 30 18 h. min. src. 10 11 25 141 [ 243] Encampment on Little Sandy creel.:. DETERMINATION OF LO:KGITUDE. Auguc;:t , 1842.-Altitudc of the Sun. Observations. FIR ST SEP.!ES. !>EC0!\0 SERlE::- bl ltitude of th0 Time of chronometer. : Double altitude.of the\ Time of cbr aometer. Do~uncsalowcr limb. ,I un' lower limb. --- - ---------------,-- "· min. sec. dcg. 111 in. sec. h. 11!!11. .~1'('. d.eg. min. 'I' C. 44 51 50 7 24 45.5 43 ::G9 30 7 2 26.5 44 33 00 7 25 34.0 43 16 50 7 2'.) 02.0 44 ln 50 7 26 1 ~. 0 43 f\6 30 7 2, 2!>.4 44 04 00 7 26 53.5 42 52 25 7 :10 06.5 43 50 50 7 27 29.0 42 38 10 7 3l) 47.0 --- Thermometer 63° . Index error = + 2~o" . Result of calculation. Mean time. Advance. Longitude . h. min. rc. h. ~~tin. scr. deg. min. su. 30 110 07 46 5 03 2J 2 24 ( DETEHMINATLOJ.\' OF LONCilTUDE. August 8, 1 42.--Altituue of Arcturu~. Observations. FIR 1' SCRIES. SECOI\0 SERIES· --- - --- •Double altitude of Arc- Time of chronometer. Double altitude of Arc- Time of chronometer • turu . dtg. miH. 77 19 76 39 76 09 h. 8 sec. h. O.J lL 40 1l 30 11 Mean time. min. sec. 45 07 I turu . min. sec. deg . min. 05 3 75 21 07 31 75 00 08 4.~ 74 39 I 4.-o Thermometer, J · Result of calculation. AdYance. h. min. 3ec. - - sec. h. lit!~. 30 11 11 40 lL 11 25 1l 12 Longitude. 2 24 31 ...................... :u:-. 03 &- 53 |