Py , coe 
ey Se 464 7 
“ENCAMPMENT IN DESERT VALLEY, AMONG BLACK ROCKY HILLS. 
=e Determination of latitude, December 26, 1843—alfi tude of Polaris. 
OBSERVATION. Z 
' Double altitude of Polaris. Time of chronometer. 
Deg. min. sc. 
87-281 50 
‘ Index error = ++ 1 min. 40 sec. 
See) ce . 2 RESULT: OF CALCULATION. : 
True altitude. Mean time. Latitude. 
Deg. min. sec. h.  mhin. see. Deg. min. see. 
oe 43. 30.. 44 6 25 Bz. 4 00 09 
“CAMP. OF. DECEMBER 29-00 
€ 
Determination of ee Deceenter wi 1843—altitudes of Polaris. 
2 ‘J ESS 
i 
Deuble altitudes of Polaris. 
