OCR Text |
Show [ 243] 114 rlifth encampment on tltc ri(rht bank of J:>[attc 7·h·er-Continucd R c ult of calculation. Mean time. Advance. Lono-i tude. h. mit~. sec. It. min. cr. drg. min. sec. 9 25 20 1 55 24 100 38 10 DET.ERMl~ATlON OF LA'l'lTUDE. J nne 30, 1 42.- Altitudc of Polaris. Observations. Doubt' altitude of Po- Tinll' of <'hronomctcr. Jaris. elf~. mill. scr. "- min . sec. 7!:) 16 40 10 57 01 79 17 2.) JO 59 n 79 19 00 ll OL 20 79 19 35 ] 1 02 56 79 20 40 jL 04 44 79 21 10 lL 06 09 79 2J 50 ll 07 50 79 22 40 H 09 J!) 79 2~1 00 ll 10 59 79 24 40 11 12 SG Result of calculation. True altitude. Mean tim<'. Latitude. -------- -------------------- dtg. min. Fcc. 39 39 Ol deg. min. sec. 40 49 55 h. min. sec. 9 0!) 51 • 115 [ 243] Encarn_p1ne~tt at the .function of the /{ortlt and South forks of tlte }Jlatte rwer, .?,,700 feet above tlw level of tlte Uulf nf Jlle:t"ico. DETERMINATlO:-J OF' LONGITUDE. July 2, IS42.-Sun's altitude. Ousej·vations. l'IR T S'Er. l l!: , s t:C O'I fl St::Jtlt:S. Double altitu~c of thJ T ime of c hronom ter. Sun' lower limb. I Double altitude of th ~un's lower Jimb. Time of chronomete r. -----:~ dcg. mill. uc. 35 21 :w h. min. ~cr. chg. 111in. sec. h. 111m. sec. 7 44 57 3:.t 12 20 7 :l:$ 39 .0 34 54 00 7 4G 11.5 3~ uo OIJ 7 54 14.5 :H 24 50 7 47 :3:2.0 ~n 48 10 7 54 49.0 33 46 15 7 49 19.5 :l J 2~ 30 7 55 40.0 33 01 50 7 51 23.5 I 31 14 10 7 56 23.5 lndc~ error =-- - 1 1/ . l~c ·ult of Ctilculat·iort. --- Mean time. Advance. Longitude. h. min. sec. h. min. ~<c. dcg. mi 11 . sec. 5 53 34 1 57 50 lUl ~2 UO DETERM 1 NATION OF LONG ITUDE. July 2, lc42.-Altitudc of a Aqnil ~ . Observations. -- FIR!>T SJ!.RII!. • "ECONI) St::RI~S . -- -- --- --- Double altitude of a Time of chronometer. Double aJlitudc of a Time of chrorwmctcr. Aquilre. Aquil:c. 1- tkg. min. sec. ll. ttun. 3l'C. deg. min. sec. h. min. sec. 73 25 40 11 46 41 75 36 25 11 53 03 74 10 30 11 48 51 76 18 40 lL 55 06 74 49 20 11 50 42 76 43 10 11 56 18 R esult of calculation. - - Mean time. Advance. Longitude. li. min. Jtc. A. min. sec. cl.c;:r. mi7t. src. 9 53 58 1 57 49 101 2:2 00 |