MAGNETIC OBSERVATIONS, 
123 
OBSERVATIONS—Continued. 
Station, Camp 91, Leroux's Spring. Date, December 29, 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. 
West.| 
l 
r 
East.4 
! 
i 
Direct_ 
A. m. s. 
3 04 40. 2 
3 11 07 
O ' 
100 55 
100 57 
26 08 
o ' " 
101 22 08 
Direct_ 
Reflection_ 
Reflection_ 
Reflection_ 
Reflection_ 
Direct... 
Direct.... 
3 14 47. 1 
3 17 04 
101 23 
101 25 
22 24 ' 
101 46 24 
Reading of azimutli circle when plane of instrument is in the true meridian, by mean of four observations 
101 34 16 
Error of chronometer + 2A. 5 Got. 57.06s. 
Station, Camp 96. Date, January 9, 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. 
West.| 
f 
East. 
Direct_ 
h. m. s. 
5 20 46. 1 
/ // 
49 07 
35 01 
O ' ' 
48 31 59 
Direct. 
Reflection___ 
Reflection__ 
Reflection_ 
Reflection_ 
Direct_ 
5 16 46 
5 18 28.8 
49 30 
49 30 
33 37 
48 56 33 
Direct_ 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of three observations 
48 44 16 
Error of chronometer 3h. 0 m. 9. 42s. 
