84 
MAGNETIC OBSERVATIONS, 
OBSERVATIONS—Continued. 
Station, Camp 59, Albuquerque; latitude 35° 05' 50"; longitude 7h. Gm. 31. 47 s. 
Needle, A. Date, October 18, 1853. Hour of beginning, 1 h. 50wi. p.'m.; hour of ending, 2A. 35m. p. m. 
Observers, Lieut. A. W. Whipple and Lieut. J. C. Ives, Topograjrfucal Engineers. 
Needle vertical, face of circle north, reading of azimuth circle... 
Needle vertical, face of circle south, reading of azimuth circle....— 
Reading of azimuth circle when plane of instrument is in the magnetic meridian 
Reading of azimuth circle when plane of instrument is in the true meridian_ 
Approximate magnetic declination__ 
o 
' 
" 
38 
51 
38 
21 
38 
55 
38 
55 
38 
44 
38 
23 
38 
41 
30 
51 
54 
51 
13 
13 
21 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 2. 
Face of circle. 
Direct. 
o 
, 
t 
62 
20 
East...4 
G2 
25 
) 
62 
13 
( 
62 
07 
West__ -J 
62 
05 
\ 
62 
00 
o 
Means_ 
62 
11 40 
Sum of means. 
Half sum of means — dip.. 
Differences. 
Angles of deflection... 
Def. N. 40° from dip. 
o ' 
at 22 12 
o ' 
79 28 
79 35 
79 30 
79 20 
79 28 
79 27 
o ' 
at 102 12 
o ' 
44 GO 
44 GO 
44 72 
44 58 
44 55 
44 62 
o 
79 
45 
28 
01 
00 
10 
o ' " 
124 29 10 
o ' 
62 14 
35 
34 20 
50 
o 
17 
13 
Def. S 40° from dip. 
o ' 
at 22 12 
o ' 
SI 18 
81 15 
81 05 
81 02 
81 05 
84 07 
o ' 
at 102 12 
o ' 
43 25 
43 20 
43 28 
43 15 
43 22 
43 12 
Results. 
Ther. 75° 
! © 
> 
62 
11 
40 
N. 
62 
14 
35 
S. 
62 
14 
30 
Direct. 
By deflectors. 
a 
81 
43 
08 
20 
40 
20 
o 
02 
13 
35 
124 29 00 
o 
G2 
14 
30 
o ' 
37 48 
20 
+ 15 
04 
o 
18 
54 
10 
o- 
62 
28 
39 
Mean. 
Index error. 
True inclination. 
