L 174 ] 426 
AT FORT BOISEE. 
Determination of longitude, October 10, 1843—altitudes of « Lyre. 
OBSERVATIONS. 
- | FIRST. SERIES, 
SECOND SERIES. 
Double altitudes of | Time of chronometer. Double altitudes of | Time of.chronometer. 
a Lyre. “+ , a Lyre. 4 
Deg. min. see he min. sec. Deg. min. see. min, sec. 
94 32 20 10 3 44.0 92 34 00 10 2,1 21.0 
94 02 60 07.5 92 15 60 20 12.7 
93 44 40 16 .0 cL 86587. ae 21 «605.0 
93 24 410 16 58.0 Sl. . 37 «40 . 22 02.0 
92 56 00 18 «16.6 Si. 19) ap 22 852.7 
— Index error = + 1 min. 30 sec. 
RESULT OF CALCULATION. 
Mean. time. . Advance. Longitude. 
oe min. set he. min. sec. Deg. min. sec. 
9. 10. 17 1 08 16.8 6 + 4700. 
s ‘Relieeien of Jupiter's Jirst satellite. 
somone Bele ®t — night very clear; the planet a little yellow, with a mist of 
Observed time. Mean time. Longitude. 
- = : 
Ie min. min. ‘ 
t 22. i2e.m, 0 14 59.64, m. % — 
fe : “A ee = 
eg ENCAMPMENT ON SNAKE RIVER, BELOW “BIRCH CREEK. 
oT oceteersnerernnsenemeerenen 
n Of longitude, October 12, 1843°-emahsion of the Ite 
satellite of Ju upiter. 
RESULT OF CALCULATION. 
4 
