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Show [ 174 ] 592 F:NCAM1}MEN1' ON A 'I'HIDUTAHY OF THE DTG VE MIJALtON CUEEK, 1,3a FEE'T' ADO V~~ THE LEVEL OF 'l'H ~ GUJ .. F OF MEXICO. Cl netermination of latitudP, June 19, 1842-altitude of Polm·iJ. ODSERVATION::-;. ----- Double altitude of Polnris. Time of chronometer. De g. mm. sec. h. min. sec. 76 19 30 10 10 5~ 76 21 00 10 41 51 7(j 23 00 10 48 53 76 24 40 10 53 06 76 24 20 10 55 47 76 26 15 10 58 58 76 27 20 11 00 25 7 27 50 11 01 49 76 28 50 11 04 36 7) 29 50 11 06 52 RESULT OF CALCULATION. True altitud . Deg. 38 . . mtn. sec. H 07 M an time. Latitude. ------ h. mtn. 9 13 sec. 11 Dee;. min. sec. 39 30 40 593 [ 174 Jt ENCAMPMENT ON 'Irug LITTI .. E flLTJE RlVER, t,fiOO FEET ABOVJt; TilE ..EVEL Of' THE GUI,}' 01" MEXICO. Determination of latitude, .June 25, 1812-altitude of Polaris. OllSERVATJONS. Double altitude of Polaris. Time of <·hronomcter. - - Dl'g. min. • cc. 78 h. min . lJCC. 15 20 10 36 11. 7 l6 45 10 40 50 78 17 50 10 43 36 78 19 21> 10 45 14 78 20 15 10 46 67 7 20 20 10 -18 26 78 20 !'iO 10 49 45 78 21 25 10 51 23 ~18 22 15 10 52 40 78 23 10 10 54 17 Tndcx error = + 25 sec. RESULT OF CALCULATION. ----- True altitude. Mean time. Latitude. -- Deg. min. sec. lt. mzn. sec. Deg. min. sec. 39 09 00 8 57 19 40 26 56 .. De/erminatian of langitude, June 25, 1842- altitude of G .flqui/;e. ODSERVATIONS. FIRST SF.llil:S. _ I_ SECOND SJ:RU:S . Doubl(\ altitude of n Time of chronometer. Aquilro. Double altitude of a Time of chronometer. Deg. min. 50 34 51 19 52 ll sec. 10 10 15 Mean time. ------ h. min. sec. 9 17 26 lt. ll ll 11 mtn. Ol 03 06 sec. 45.0 47.3 07.0 Aquilro. De~. mm. 53 06 53 40 54 27 RESULT OF CALCULATION. Advance. lt. min. sec. 1 49 39 sec. 20 07 15 !t. 11 11 11 min. 08 10 12 Longitude. Dfg. min. sec. 98 54. 07 seo. 34.0 05.5 11.0 --·------------------------------------------------------------ |
