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Show [ 174 ] 426 I AT FOR'f UOISEE. Determination of longitttde, October 10, 1843-altitudes of a Lyrtl. OllSERVA'riONS. FIRST 8 &ni ES. SECOND BElliES. Double altituclcs of Time of chronometer. Double altituclcs of Time of chronome~r. a Lyrro. a Lync. Deg. mm. sec. 94 32 20 94- 02 50 93 4.1 40 93 21 10 92 56 00 lt. 10 ------ Mean time. 1t. mm. set. 9 10 17 min. sec. De g . nun. 13 11.0 92 34 15 07.5 92 15 16 00.0 91 57 16 68.0 91 3 18 16.6 91 19 Index error= + 1 min. ~0 sec. RESULT OF CALCULATION. Advance. lt. r~lin. sec. 1 08 16.8 sec. 00 50 30 40 40 h. min. 10 19 20 21 22 22 Longitude. Deg. min. sec. 116 47 00 sec. 21.0 12.7 05.0 02.0 52.7 Emersion of Jupiter's first satellite. Jupiter about 10° high; moon bright; night very clear; tho planet a little yellow, with a mist of tile horizon; observation good. Observed time. Mean time. Longitude. ll. min. sec. ll. nwn. sec. 1 23 12 a.m. 0 14- 59.6 a. m. ENCAMPMENT ON SNAKE RIVER, BELOW BIRCH CREEK. Determination of longitude, October 12, 1843-emersion of the first satellite of Jupiter. Observed time. h. min. 7 50 stc. 23 RE ULT O:F CALCULATION. Mean time. II.. min. 6 42 sec. 25.1 Longitude. Dtg. min. &~· 117 10 19 - - - 427 [ 174 ] ENCAMPMENT ON NAKE RIVER, llEI~OW DIRCH CREEK. IJetermination of latitude, October 12, 1813-altitudes of ].Jolaris. OllSERVATIONS. Double altitudes of P olariR. Tim of chronometer. Deg. mtn. sec. • lt. mtn. sec . 90 11 40 8 56 58 90 12 10 58 19 90 13 60 59 53 90 14 00 9 01 05 90 16 16 02 0~ 90 16 30 03 4.1 90 17 20 06 28 90 17 0 06 64- 90 19 20 08 35 90 20 50 10 31 Index error = + 1 min. 28 sec. RESULT OF CALCULATION. True altitude. Mean time. Latitude. Deg. min. see. 46 07 12 Deg. mtn. sec. 7 55 25 Deg. mzn. sec. 44- 17 36 Determination of longitude, Octobe1· 12, 1843-altitudes of a Lyrce. ODSEHVATIONS. ------------------------------- FIRST SERIES. SECOND SERIES. - Double altitudes of Time of chronometer. Double altitudes of Time of chronometer. a Lynn. a Lynn. Deg. min. sec. lt. min. sec. Deg. nun. sec. lt. min. sec. 87 02 00 10 27 17.0 85 17 30 10 32 49.5 86 36 10 29 01.7 84 59 25 33 41.0 86 14 30 30 04.0 84 42 00 34 34..0 85 52 50 31 07.3 84 23 40 35 26.0 85 34 30 32 00.0 84 06 20 36 16.0 - - - - Mean time. lt. min. 9 24 sec. 22 Thermometer 40°. Indo, ctror =+ 1 min. 28 sec. RESULT OF CALCULATION. IL. 1 Advance. mm. sec. 07 66.1 Longitude. •• |
