OCR Text |
Show [ 243] 106 Encampment on a t1·ibuta·ry of tlze Big Fennillion creek , 1,350 f eet a!Jot·c tfte level of the Gulf of llle:t·ico. DETERMINATION OF L ON G rTUD E. June 19, 1842.-Altitude of the Sun. Observat·ions. . FIRST SERIES. SECOND SERI ES . Double altitude of the Time of chronometer. Double a ltitude of the lower limb of the Snn. Time of chronometer. lower limb of the 'un. cleg. min. sec. h. min. sec. deg. min. sec. I h. min. sec. 3~ 16 40 7 18 16 .................... , .................... 37 59 30 7 19 02.4 36 16 40 7 23 3~) 37 43 45 7 19 45 35 46 50 7 24 59 .5 37 24 35 7 20 36 35 27 40 7 25 50.6 36 45 20 7 22 22 .......................................... I I Index error = - 42''. . Result of calculation. Mean time. Advance. Longitude. h. 1nin. sec. h. min. sec. dl'!f. min. sec. 5 39 43 1 42 41 96 48 05 DETERMINA.TION OF LATITUDE. June 19, 1842.-Altitudc of Polaris. Observations. Double altitude of Time of chronometer. Polaris. dcg. min. sec. h. min. Sl'r. 76 19 30 10 40 52 76 21 00 10 44- 51 76 23 00 10 48 53 76 24 40 10 53 06 76 24 20 10 55 47 76 26 15 10 5 5 76 27 20 11 00 25 76 27 50 11 01 49 76 2A 50 11 04 36 76 29 50 11 06 52 Result of calculation. True altitude. Mean time. La titude. deg. min. sec. 3~ 30 40 cleg. min. sec. 3!j 11 07 h. min. sec. 9 13 11 107 [ 243] Encampment on the Little Blue river, l ,600 f eet above the level of tlte Gulf of Mexico. DETERMINATION OF LATITUD E. June 25, 1842.-Altitude of Polaris. Observatious . Double altitude of Po- Time of chrt~>nometer . cleg. 7B 7 78 78 78 78 78 78 78 78 laris. min. sec. h. min. 15 20 10 36 16 45 10 40 17 50 10 43 19 25 10 45 20 15 10 46 20 20 10 48 20 50 10 49 21 25 10 51 22 15 10 52 23 10 10 54 Index error = + 25". Result of calculation. sec. 14 50 36 14 57 25 45 2:l 40 17 True altitude. Mean time. Latitude. • tleg. min. sec. h. min. sec. deg. mm. 39 09 00 8 57 19 40 26 DETERMINATION OF LONGITUDE. June 25, 1842.-Altitude of a Aquilre. Observations. sec. 56 FJRST SERIES . SECOND liERIES. Double altitude of a Time of chronometer. Double altitude of a Time of chronometer . Aquilre. ~a· min. sec. h. 34 40 11 51 19 10 11 52 11 15 11 Mean time. h. min. sec. 9 17 26 Aquilre. min. sec. d/'11', min. 01 45.0 53 Ot' 03 47.3 53 40 06 07.0 54 27 R esult of calculation. Advance. h. min. sec. 1 49 39 sec. h. min. 20 11 0 00 11 10 15 ll 12 Longitude. deg. 1nin. sec. 98 54 07 sec. 34.0 05.5 11.0 |