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Show ( 174 J 424 SECOND ENGAMrMBNT ON DlG WOOD RIVER. Determination of longitude, Octobe1· 8 18'13-allitude of o. Lyr;p OB ERVATIONS. -- ~~------- ------- Double altitude of a Lyrre. 'J'imc of chronom<'lor. Douhlo altitude of Time of chronometer. (~ J,yrro. - ------ - h. min. sel'. 9 34 OG D(~g. mm. sec. Ill lti 50 Deg. min. src. lt. 95 54 00 10 min. sec. 17 09.5 intcrruptcJ by clouJs. Thermometer 4 7°. 5. Determination of longitude-altitudes of a. .!lquilaJ. Double altitudes of a Aquilre. Deg. mtn. sec. 80 31 00 80 12 20 79 52 20 OBSERVATIONS. Time of chronometer. h. m&n. sec. 10 21 05.0 25 04.4 26 09.0 Index error - + 1 min. 3('1 sec. RESULT OF CALCULATION. • Mean time. Advance. Longitude. h .. min. sec. ''· mtn. sec. De g. min. 9 17 16 l 07 49.7 116 22 8CC· 40 425 [ 174 ] A'f f~OR'J' DOI~EE . Determination of latitude, Octobc1· 10, 18'13-altitudes oifP l · ( · t 1 o arzs, wzt lt, lle sextant.) OB 'ERV ATIONS. Double altitud s of Polnris. Time of chronomct<'r. Del{. mm. ser. lt. min. sec. 89 17 40 9 10 55 89 18 ao 12 07 89 19 60 13 55 89 21 20 ]!) 48 89 22 20 17 22 89 23 10 18 2 89 24 20 19 !'>6 89 25 3 22 14 89 27 00 23 57 89 27 50 25 15 fndcx error = + I min. 30 sec. RE UL1' OF CAJ.. . CULATION. True altitude. Deg. min. sec. 44 til 09 Mean time. lt. min. sec. 8 09 •14 Latitude. Deg. min. sec. 43 48 64 .!lltiludes oj' Polaris, (with the circle,) Octobe1· 10, l S43. ODSERVATIONS. Circle readings. Time of chronometer. Deg. mm. sec. lt. mitL, sec. !} 40 22 179 27 40 la2 42 359 41 55 01 30 4!5 55 17 50 538 28 00 49 13 51 60 713 00 50 56 05 58 02 177 39 20 69 62 Thermometer 60°. -----------R-E=~SULT OF CALCULATION. True altitude. Mean time. Latit\lde. -~-------- ~----------- -- - ------- --- Deg. min. sec. 44 51 69 lt. min. sec. 8 11 26 - ---- - Menu latitude 43 dog. 49 min. 22 sec. T>c~t· min. sec. 43 49 61 |