“549 [ 1” 3 
ENCAMPMENT NEAR BENT'S FORT, ON’ THE ARKANSAS RIVER. 
~ Determination of longitude, July 2, 1$44—altitudes of Altair.” 
OBSERVATIONS. 
’ FIRST 
SERIES. - SecoND SERTES. 
———_ 
Double altitudes of 
Altair. 
| Time of chronometer. Double altitudes of | Time of chronometer. 
* Altair. 
Dig. min. sec. h. min. sec. Deg. min. sec. h. min. sec 
ae iz -20 eels 3 470 74.11 10 07.4 
7 30. 30 22 5.0 74. 35 26 134... 
ta OO OO 23 . 27.7 yc: Seamer 6b) 29... 10.0. 
73> AR «30 24 27.6 75 Seat 30. 
73 4) 270 “25° 45.0 75 37 += 40 31° 
Ps! - . — MA - epee eager —_ 
Index error = + 7 sec. - eee 
- x RESULT OF CALCULATION. a 
Mean time. 4 Retard. Longitude. 
h. min. s€c. h. m. S€C. , 
9 41 40 $0 tae 4 J 
Z om “he a os Tp 
B gore \ OBSERVATIONS. os aes 
Double altitudes of Polaris. Time of chronometer. 
. se eng: 
Deg. min. sec. h. min. ~ sec. 
% -39 Se. ee 
- 76. 38 Be = > aoe Te aoe 
SEE RESULT OF CALCULATION: saa 
‘True altitude Mean time. | Latitude. 
— co = 
i 
- Deg. min. sec. Ah. min. _sec. |. Deg. min. sec. 
37 283-5 9 16 0 | 38 51 15 
i 4. . 
