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Show 360 ENCAMPMENT AT' BOIJ.rN() ~WHTKCS. ])clermi,wtion oflon!{illldt•, .Ju(IJ I D, 1 '13- di,,tance from lite moon' second Limb tv ,/upil e'l'. 3 0 li :-.Jo: ll V A'J' l 0 N S. Time of dnononwtcr. A ppun•11 t di~;tuncr. ft. mm. src. !) 39 03 12 27 44 26 4A 21 50 o~r 51 41 ) )rli· 11111/, ll'C. 5!) '11 ao 5!) '.I:J 10 (1!} 44 30 1)9 45 30 59 4G 10 59 15 50 I ml c 'C c rror -..: - 30 t~ec . HE. ULT 01!' AT.CU LA'f 10 N. True distance. Mcun tim ' at Greenwich. l.ongituuc. ENCAMPMENT ON SOUTH FOHK OF PLATTE RIVER. Deter111ination of latitude, July 21, 1843-altitudes ofPotaris. OllSERVATIO~S . Double altitudes of PolariR. Time of chronometer. De~J. min. sec. lt. mt.n. .sec. 78 18 10 10 4.8 27 78 19 20 10 50 66 78 20 20 10 62 22 78 21 4.0 10 51 27 78 22 50 10 55 18 78 21 10 10 57 43 78 26 50 10 69 ll 78 27 00 11 01 59 78 29 50 11 05 07 78 30 4.0 11 06 06 Index error =- - 30 sec. UESULT OF CALCULA'l'ION. -I True altitude. M •an time. Latitude. Def?. 'min. sec. lt. 111/11, sec. D,g. min. sec. 39 10 36 9 48 52 39 41 45 361 [ 174 ] EN 'AMPMENT ON • OUTJT F'ORK OF PT. \'I'TJ~ IUVEit Dete1·minalion of lonn·itudl', July 21 1 S 13-allitudN~ of.!lrcturus. - Double ollitndCH of Arcturus. - Deg. min. ,,rc. 74 7:l 73 73 72 41 40 () l 00 26 15 04 20 40 50 Mean timo. lt. min. sec. 10 07 36 OH EltVATION • Time of chronomet 'r. Doub)o altitudes lt. 11 Arcturus. ---- min. FCC. De g. 1n1n. 09 52.0 71 63 12 00.2 71 35 13 07.5 71 12 11 05.:3 70 4.!) 16 03.G 70 28 Index error_, - 30 sec. RESULT OF CALCULA'I'ION. Advance. lt. mm. sec. 1 08 17.7 sec. 40 45 30 50 15 of Timo of chronometer. lt. min. .'Ire. 11 17 07.8 17 67.7 18 65.5 19 M .O 20 53.0 Longitude. De~. min. sec. 105 25 38 •• |