pia] 
s 
410 
AT FORT HALL. 
a 
€, 
Determination of longitude, September 21, 1843—altitudes of the sun. 
OBSERVATIONS. 
5 
FIRST SERIES. i SECOND SERIES. ie 
de ao : -| 
ble altitudes of the} ‘Time, of chronometer. Double altitudes of the | Time of chronometer. 
ebb tic. sun’s lower limb. 
Deg. min. ste. h. min. sec. Deg. min, ‘see. “h. min. see. 
56 . 29 ».900 d 9 34 22.0 57 §=16 4500 tS 36... $7.2 
gh <5 0. 00 34 55.5 57 24 00 Sta 11.0- 
“Se ot bu 35” S14 SS eS 37 
or. Ul 35 a PRs 3 bz .@9, 10 ¢ 37 69.4 
G7 Of. (16 “36 “21.4 S747 10 38 24.3 
Index error — +- 1 min. 37 sec. 
“7 RESULT OF CALCULATION. rs 
. “te se San 23 ae 
Mean time. > Advance. Longitude. m 
sd bss 
* h. min. sec. - min. sec. Deg. min. sec. 
8 34 20 eee peek BEG 112 639 C64 
ee - a 
oe — ae 
a 
4 + ‘e 
* 
ees ‘ 
