126 
MAGNETIC OBSERVATIONS, 
OBSERVATIONS—Continued. 
Station, Camp 103. Date, January 21, 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 
Direct_ 
4. m. s. 
5 41 28 
5 42 57 
O ll 
32 10 
32 09 
42 40 
o ' " 
31 26 60 
Direct_ 
Reflection... 
Reflection_ 
Reflection .. 
Reflection. 
East...-j 
Direct. 
Direct.. 
5 45 26.9 
5 46 44.3 
32 30 
32 30 
44 21 
31 45 39 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of four observations 
31 36 14 
Error of chronometer -j- 34. 04m. 14. 23s. 
Station, Camp 105. Date, January 23, 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. 
f 
West. ■{ 
[ 
East_ -| 
Direct_ 
4. m. s. 
7 29 28.8 
O ' 
48 04 
O ' ' 
1 22 23.8 
o ' " 
46 41 36.2 
Direct__ 
Reflection_. _ 
Reflection __ 
Reflection ___ 
Direct.__ 
7 32 12. 1 
48 20 
1 23 23 
46 56 37 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of two observations. 
46 49 06 
rror of chronometer -f- 34. 05m. 14.15s. 
