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Show [ 174 J 458 ENCAMPMENT ON A TRIBUTARY TO THE LAKE AND HEAD WATER OF THE TLAMATII RIVER. Dete·,.,nination of longil'ude, Deamber lJ, 1tH3-ultit tde;) of a- Lyr13• Oll 'ER V ATION . t'lllST S UU Jo: ' . HtCONO Si;lll.ES. Double altitudes of Time of chronomrtcr. Double altitudes of Time of chronometer. ex Lyr:n. IJeg. 111 in. sec. h. 63 40 10 7 63 13 tO 62 5(} 40 62 31 40 62 l L 45 Mean time. h. min. sec. 6 26 37 - ----- ex Lynn. mtn. !;('C. Deg. 711/ II . JO 36.5 61 57 ll 56.5 61 :n 13 01.0 61 19 13 54.0 61 Ol 15 08.7 60 44 [ndex error ... + 1 min. 32 ~c. RESULT OF CALCULATION. h. 0 Advanc . nun. sec. 48 41.0 f'C. h. min. 00 7 lfi 50 16 35 17 40 18 00 l9 Longitude. Emersion of Jupile'r's first satellz"te. Observed time. h. 6 nnn. 07 sec. 01 h .. 5 Mean time. mtn. 18 sec. 21.6 Longitude. Deg. t 2 L min. 20 sec 49.8 44.4 40.6 36.0 30.0 sec. 4.2 459 [ 174 ] ENCAMPMENT ON A TRIDUT;\RY TO THE LAKE AND HEAD WATER OF THE l LA MATH HIVEH Determination of latitude, Decernbe1· l 3 1 4 ,_ tt ·,. ·' if p l . 1 ,) u z u.urs o o arts. OllSF:R \AT ION'. --- Douole altitude~; of Polari.~. Timo of chronometer. Deg. 711 L/1. 88 38 88 :19 88 39 88 39 88 40 88 40 88 40 88 40 88 41 88 40 True altitude. Deg. mitt. sec. 44 19 46 sec. 20 30 10 25 20 50 20 30 10 35 -- Index error = + l min. 32 sec. RE ULT OF CALCULATION. Mean time. ft. min. .~cc. 6 41 10 h. 7 min. sec. 24 09 25 41 26 53 28 18 29 34 30 ;J7 31 16 !32 45 33 57 34 51 Latitude. Deg. mm. sec. 42 51 26 ENCAMPMENT ON SUMMER LAKE. Determination of latitude, December 16, 184~3-altitudes of Polaris. OBSERVATIONS. Double altitudes of Polaris. Time of chronometer. Deg. 88 88 88 88 True altitude. mw. 46 46 46 47 ------------------- D.f{. min. st c. 23 07 ---- sec. 30 20 40 00 fndcx error .... + l min. 35 sec. RESULT Or CALCULATIO~. Mean time. h. m·m. sec. 6 06 48 II . 6 min. 48 50 5L 52 sec 50 28 53 59 Latitud Deg. mm sec 42 57 22 •• |
