116 
MAGNETIC OBSERVATIONS, 
OBSERVATIONS—Continued. 
Station, Camp 81. Date, December 8, 1853. 
OBSERVATIONS ON POLARIS. 
Face of circle. 
Whether observations are 
direct or by reflection. 
Time of observa¬ 
tion by chro¬ 
nometer No. 10. 
Reading of 
azimuth cir¬ 
cle. 
Computed azi¬ 
muth of Po¬ 
laris. 
Reading of azimuth 
circle when plane 
of instrument is in 
the true meridian. 
r 
West ..-j 
r 
East_-j 
l 
Direct__ 
h. m. s. 
2 06 40. 3 
2 07 28.5 
O ' 
53 00 
53 00 
/ // 
50 07 
O'/ // 
53 50 07 
Direct_ 
Reflection.. 
Reflection... 
Reflection_ 
Reflection.. 
Direct_ 
2 09 18.4 
2 10 30. 6 
53 27 
53 27 
48 56 
54 15 56 
Direct_ 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of four observations 
54 03 01 
Error of chronometer + 2 h. 50 m. 01.98s. 
Station, Camp 108. Date, January 28, 1854. 
OBSERVATIONS ON POLARIS. 
Face of circle. 
Whether observations are 
direct or by reflection. 
Time of observa¬ 
tion by chro¬ 
nometer No. 10. 
Reading of 
azimuth cir¬ 
cle. 
Computed azi¬ 
muth of Po¬ 
laris. 
Reading of azimuth 
circle when plane 
of instrument is in 
the true meridian. 
r 
West. -j 
l 
[ 
East . -j 
Direct_ 
h. m. s. 
6 23 22.7 
6 24 -37.8 
o i 
75 27 
75 26 
1 11 
59 12 
o • ' t 
74 26 18 
Direct_ 
Reflection_ 
Reflection_ 
Reflection_ 
Reflection_ 
Direct_ 
6 19 06.7 
6 25 49. 6 
75 42 
75 43 
57 36 
74 44 54 
Direct_ 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of four observations 
74 35 36 
Error of chronometer-]- 3/t. 6m. 47.5s. 
Note. —For the remaining magnetic observations at Camp 108, see page 128. 
