421 
_ENCAMPMENT. ‘ON BIG WOOD RIVER, OR RIVIERE BOISEE. 
_ Determination of longitude, October 7, 1843—altitudes-of the sun. 
[174 4 
OBSERVATIONS. Se 
, FIRST SERIES. SECOND SERIES- __ 
Double altitudes ae the | Time of chronometer. | Double altitudes of ge Time of chronometer. — 
lower limb of thes lower limb of the su 
é 
Deg. min. sec. h. min. see. Deg. min. sée. h. min. see. 
. 36 22 55 4 46 24.0 35 28 650 oe ER eee 
36 10 007 47 = 03.6 35 20 35 49 36.8 
36 «Ol 05 47 31.0 35 «(02— 00 50 =. 35.3 
35 48q 20 48 08.7 34° 53 30 51 5 
35 39 25 Z 48 37.8 34 4520 51 eid 
Index error = + 1 min. 30 sec. 
= _ “RESULT OF CALCULATION. 
Mean time. © Advance. Longitude. s 
h. min. sec. h. min. see. Deg. min. sec. 
eS 8 i eee "Feeders 115. 54 46 
ase ors A es Cerna fl Ape -atitndeg of Polaris, (with 
nt.) 
oe cipee 2 
ss cel crags teem: neni 
zs : ilies 
Double altitudes of Polaris. 
$s 
Deg. min. sec. 
88 Zi. 40 
oe” as 
88 24 20 
88 25 25 
88. 26.. 40 
= Index enor =} 1 min 90 c is 
RESULT. OF ‘CALCULATION. 
* : a Pe eRe oe Be : * 
T r : 1 it i : ” C Mean ti me. : Latitude. are — 
