1865 [im 
— AMPMENT ON A HIGH PRAIRIE, BROKEN BY BUTTES AND BOULDERS, 
TH pale nae ige CEDARS, FORMING THE DIVIDING GROUNDS BE [WEEN 
AMIE A ND CACHE-A LA-POUDRE RIVERS. 
Determination of tongitude, July 30, 1843—allitudes of Arcturus. 
OBSERVATIONS. 
FIRST SERIES. SECOND SERIES. 
Double altitudes of | Time of chronometer. || Double altitudes of | Time of chronometer. 
Arcturus. Arcturus. atl 
Deg. min. Sec. h. min. sec. Deg. min. sec. min 
47 50 00 11 40 39.5 45 46 30 il 46 07.0 
46 56 40 , 43 00.5 45 05 40 a7 6 85.5 
46 27 40 44 ¥6:5 44 45 20 48 60.0 
Index error — + 1 min. 30 sec. 
RESULT OF CALCULATION. 
Mean time. Advance. Longitude. 
he min. see. h. min. sec. Deg. min. sec. 
10 41 18 : 1 03 53.2 105 35 17 
Determination of latitude, July 30, 1843—allitudes of Polaris. 
x OBSERVATIONS. — 
% . z s 
Double altitudes of Polaris. Time of chronometer. 
. . min. see. , h. min. see. 
82 20 00 ll 55 14 
88 Sk 80 57 39 
Index error = ++ 1 min. 30 sec. 
RESULT OF CALCULATION. 
True altitude. Mean time. Latitude. 
mn. 800. kh ; sec. Deg. min. 8€t- 
4l te 00 10 52 33 4l 02 i9 
= < 
crac iss Esa 
