ie 
427 as [1m] - 
ENCAMPMENT ON SNAKE RIVER, BELOW BIRCH CREEK. 
Determination of latitude, October 12, 1843—altiludes of Polaris. 
OBSERVATIONS. ‘ —" 
~~ y 
Double altitudes of Polaris. Time of chronometer. 
eB 
Deg. min. set. — h. min. see. 
90 il 40 8 56 58 
90 1%. 10 5819) 
90 13 50 59 53 
90 14 ~~ 00 9 Ol 06 
90 15 15 02 
90 16 03 41 
_— we 05 28 
90 17 06 54 
90 19 20 08 35 
90 20 10 31 
Index error — -++-1 min. 28 sec. 
RESULT OF CALCULATION. 
go ah ae 
True altitude. Mean time. Latitude. - 
Deg. min. see. _ Deg, min. sec. Deg. “min. set. 
45 07 “42 7 55 25 44 17 36 
earner 
Determination of longitude, October 12, 1843—altitudes of a Lyra. 
= OBSERVATIONS. _ Se 
_—$$ $$ $$ 
Index ertor =—+ 1 ‘min. 28 sec. 
aS RESULT OF CALCULATION. 
Pre er fe min, see. 
9 of ES rT -@ 661 
ec ire eel wi a ST aa ; a ee a 
ae 
