437 , city 
ENCAMPMENT ON THE LEFT BANK OF COLUMBIA. RIVER. > 
Deters 8 of longitude, October 30, 1843—altitudes ofo L, YrZz. 
OBSE RVATIONS. 
FIRST SERIES. | SECOND SERIES. 
Double altitudes of | Time of chronometer. | Double altitudes of | Pine of chronometer, 
a Lyre. Se gn a 
oF * 
| 
Deg. min. see. kh. min. sec. Deg. min. sec. | h. min. sec 
- 68 Bi <a 9 29... 33.0. || ee ee ee ¢° 3 8 
50 30 42.3 8i 30 20 35. 37 
82 46 00 31 By al BA A BO 36 «30 
82. 25 10 32 <0 SO 54 10 37 25 
82 05 30 33 OB 1.0 80 36 50 38 iS 
2 At 
ED 
Index error — -+- 1 min. 23 sec. _ 
ao ee RESULT OF CALCULATION. 
: : 
Mean time. Advance. | Longitude. 
* 
min. sec. A. amt. gee Deg. min. sec: 
S26 39 1 07 39.1 a19- 2 18 
24. 2 
= 
SECOND ENCAMPMENT ON COLUMBIA RIVER. 
Determination of latitude, October 31, ceca: ee of i —- 
i aiscocears donk ete OBSERVATIONS. eee 
Double altitudes of Polaris. " 
es "he 
Deg. min. sec 
94 09 10 
94 10 10 
94 10 49 
94 il 30 
ll 40 
* 
i Index error = + 1 min. 22sec. 
RESULT OF CALCULATION. 
ia 
‘True altitude. Mean time. Latitude; 
pletisiaine me) sf 
a ¥ 
