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Show t ]74 ] F:NCAMPMENT AT RO(;K • PRING Determinatwn ofltmg,tudc, .!1Jwil1 b Io 14-alttltnlt•,\ of the sun OB ' l·' HVATI O N~. 1 111-:T q,}t ll .l'i . I' I F:CON ll fll:lllE!i. I Double altitude::; of the • 1 Tunc of ehrononwtN · I sun's lower limb. Uonlll<> ultilu<lrs 1)f the «un '" lower l1mh. T i nw of chronometer. Dea. mtn sec. 69 69 69 69 69 09 40 2:l 40 36 00 47 no 68 45 Mean tune. h. min. src. 2;3 39 h. 7 nl/n . sec. Dee;. min. ,</('(. :14 27.5 70 10 3!) :~5 01.0 7C) 20 :35 '3[ 1:J. ',! 70 :n 15 :l(i 02. '3 70 45 10 :3G 2!l. !> 70 5 ()5 Index error - 2 !:!CC. JtESU J,T OF CAJ.C UJ. A'l' JON · H tard h. min. sec. 0 4t.i 5G.3 lt. nun.. sec. 7 36 5?.2 37 23.2 37 50.5 38 21.G 38 57.4 I.on);ilude. netern~ina~on of latittale, Jlpri/16, 1844-nteridian altitudes of the sun. Oll ~ ERVATION Double altitudes of th sun' lower limh. Time of chronometer. Dcg. min. h. mi11. soc. -'i(. 130 44 0 ) ! 06 03 130 47 60 07 !34 130 50 20 10 03 130 50 4& 11 66 130 50 45 13 07 130 50 30 14. 12 130 50 00 15 21 130 49 20 lG 06 130 48 45 JG 50 13 17 40 17 36 13 46 30 18 53 13 43 46 20 06 --- Index error = - 2 sec. llE ' UJJT 0}' CALCULATION. 'T'rue central nltitude. De g. 65 mm. 40 sec. 6 Apparent time of t.ran!"it. h. ll min. ) i\ .'fee. 6' Latitude. Dcg. 34 min. 41 Mean latitud(• at thio encampment 34 dcg. 41 min. 42 soc. sec. 66 505 [ 174 ] ENCAMPMENT AT THE · PJUNC, HEAD OJ· 1\ ~M 1\ LT. . THEA i\1 AMONG THE FOOT JHLL~ OF 'J'IIE MOl1N'l'AIN. Dderminrt!ioll of lo •,gitude, .!lpril 18, IR 11-altitudt's of lllr' sun. 0 B 'I 1•~ It V A T IO N S. FlllST SJ: HJ "Jo:H . Double nltituuf'H of the Time of chrouomeiN. sun's lower limb. Douhlr nlliludrH oft he Tinw of ehronom<>tor. fiun '~o; lowrr limh. Deg. min. sec. 58 10 57 57 57 57 06 46 53 31 50 19 00 04 20 --- Mean time. h. min. sec. 4 10 14 "· 3 nL/11. src. Deg. mtn. lG 44.0 56 311 17 32.4 5G IG J 09.0 56 04 1 39.1 55 52 19 14 .3 II 55 39 I Indt•x <'rror """" - 18 F:rc. RESULT OF CALCULATJON. Hctard. IL. min. sec. 0 50 23.0 sec. h. min. sec. 2 !) :f 20 23.0 f>O 21 11.8 5[) 21 41.2 30 22 11.3 !lO 22 43. Longitude. Dcg. min. sec. 117 13 21 Determination of flllitude, .llprill8, 1844-altitudes of Polaris. OllSEltVATION . Double altitud.es of Polaris. Time of chronometer. Deg. mtn. 8CC. ft. mm. sec. 66 58 50 ·; 02 28 66 58 10 03 59 66 ns 10 05 03 66 56 45 06 3G I ndcx error == - I 8 sec. RE ULT OJo' CALCULA1' lON. True altitude. -- Deg. min. sec. 33 27 22 h. 7 Mean time. min. 55 sec. 00 De g. 34 Latitude. min. 27 sec. 03 |