ST. VRAIN'S FORT. 
Determination of long gilude, July 4, 1843—altitudes of the sun. 
z OBSERVATIONS. 
FIRST SERIES. SECOND SEETIES. 
prem altitudes svt the | Time of chronometer. |} Double altitudes of the Time of chronometer. 
un’s lower lim sun’s lower limb. z 
Deg. min. see h. min, see | Deg. min, see. h. min. see. 
20 0 14 45.0 | BL 42 50 6 19 OL.7 
53 02 20 1S 2395 | §1 29 00 19 (390 
52 49 50 16 08 5 0 37 30 21 56.0 
52 26 55 17 04.0 50 09 00 12.0 
62 a. 00 ti 441.0 49 56 40 23 45.0 
Index error = — 47 sec. “ 
2 F : 
RESULT OF CALCULATION. 
Mean time Advance. ; Longitude. 
h. min. sec. h. min. see. Deg. min. sec, 
4 57 50 1 17 05.9 105 12 23 
ENCAMPMENT ON THE SOUTH FORK OF PLATTE RIVER, NEAR CHERRY 
5 CREEK, — 
Determination of latitude, July 7, 1843—altitudes of Polaris. 
OBSERVATIONS. te ee 
Double altitudes of Polaris. Time of chronometer. 
Deg. min. sec hk. min, — see. 
. 77 414 go 10 «(07:56 
77 +18 = oe 09" 52 
Index error = — 2 min. 13 sec, 
RESULT OF CALCULATION. 
True altitude. Mean time. Latitude. 2? 
: { evypreeis 2 _s sili 
sai = . mii 1 gee. Bs nit get. Dee, min, oe 
= 36 «86009 S 62 S44 i 39. 43. 68 
