459 [ 174 ] 
ENCAMPMENT ON A TRIBUTARY TO THE LAKE AND HEAD WATER OF THE 
TLAMATH RIVER. 
Determination-of latitude, December 13, 1843—altitudes of Polaris. 
OBSERVATIONS, 
Double altitudes of Polaris. Time of chronometer. ; 
Deg. min. see. h. min. see. 
8 38 20 7 2 09 
88 39 30 41 
39 10 26 53 
88 39 25 28 18 > 
88 46 20 \ ‘29 34 
88 40 50 30 37 
88 40 20 31 46 
88 40 30 32 45 
88 41 10 33 57 
88 40 35 34 54 
Index error = +- 1 min. 32 sec. 
RESULT OF CALCULATION. 
True altitude. Mean time. Latitude. 
\ 
Deg. min. sec. h. min. see. Deg. min. sec. . 
44 19 46 6 41 10 42 51 26 
ENCAMPMENT ON SUMMER LAKE. 
Determination of latitude, December 16, 1843—altitudes of Polaris. — 
OBSERVATIONS. ete 
Double altitudes of Polaris. Time of chronometer. . 
t 
i 
| 
} 
| 
Deg. min. sec. h. min. sec. 
88 46 30 6 48 
88 46 20 50 28 
46 40 51 53 
88 47 00 52 59 
Index error — -++ 1 min. 35 sec. 
RESULT OF CALCULATION. 
True altitude. Mean time. Latitude 
