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Show [ 243] 132 Encampment at tlte '17wutlt of D eer crcek-Continucu. 1JETERMINATION OF LOl\OlTU DE. ' July 26, 1 42.-Altitude of the Sun. Observations. Double altitude of the Time of chronometer. lower limb of the un. deg. 46 46 45 45 4.5 -l4 1/lill. sec. 47 45 31 40 Interrupted 37 22 01 37 15 10 10 30 h. Hlin. 7 21 7 21 by cloud . 7 7 7 7 21 24 25 27 'rhennomctcr, 83°. Result of calculation. St'f 03.0 4j,;) J 4.5 5fj . 6 54.0 00.0 Mean time. Advance. Longrtud . It. min. sec. h. min. sec. dc~_f . 111i11 . ~er. 5 09 54 2 13 33 lOG 43 15 DETERl\JIN ATION OF' LONGITUDE. July 26, 1842.- Altitude of Arcturus. Observations. FIRST SERIES. l:.C0:\0 t: Ril:. ! . Double altitude of Time of chronometer. ~;altitude o~- Time of chronomcler. Arcturu . cturus. - de~. mi11. sec. h. min . sec. dc;r. min. src. "· lltln. .1/!C 8U 29 50 11 36 47 7~ 13 30 11 41) 16.5 i9 59 10 lL 38 12 II 78 52 00 ll 41 li.O 79 34 25 11 39 20 'iS 32 :JO I ll 42 u .o -- 'rhcrmometcr, 71° . Result of r;alculat ion. -- • Mean time. Advance. Longitud". ,, . min. sec. h. min. ~/'('. 9 26 06 2 13 d4 ...................... 1!33 [ 243] Encanzpnu:nt on the .. Vortlt fork of Platte 1·iver-Upper Cache camp. DETER;\HN ATION OF LONGITUDE. July 28, 1 842.-Altitude of the Sun. Obse1·vat ions. F IRST SCRIE<;. I SECOND SE RIE'I. - - Double altitndc of the Time of chronometer. Jower limb of the Double altitude of tl1c Time of chronomc· un. lower limb of the Sun. tcr. I lUg. /111/1. ur. 44.4:> 5162 3150 ' "7· m2in5. s2ec1. .5 d4('3~ . m4i6n . 2s0ec . ft7. mi2n9. 1~e7c.. 7 7 26 05 43 35 25 7 29 48 44 4J 35 7 2G 36.2 43 17 15 7 30 37 44 30 20 7 27 17.5 43 05 05 7 31 ] J 44 ].i 20 7 27 58 .6 42 51 40 7 31 47 .7 'rhcrmometer 80°.5. Index error --= + 1~". Result fJf calculation. Mean time. Advance. Longitude. h. mm. sec. ft. mirt. sec. cleg. min. S('C. 5 13 27 2 15 09 107 15 55 DE'TERMIN.4TION OF L .1TITUDE. July 2(J, 1842.-Altitude of Polaris. Observations. Double altitude of Po- Time of chronometer. lari!>. -- drg. min. scr. h. min. sec. 84 31 30 11 24 10 4 32 45 11 25 45 84 35 10 11 27 55 84 35 30 11 29 12 84 36 35 11 30 34 84 38 10 11 31 50 4 39 55 ll 33 25 84 40 00 11 34 43 84 40 25 11 35 55 4 42 15 11 37 24 R esult of calculation. True altitude. Mean time. Latitullc. h. min. sec. 9 15 59 cit cr. min. sec. 42 50 53 t!l'g. min. •cc. 4:2 17 54 |