88 
MAGNETIC OBSERVATIONS 
OBSERVATIONS—Continued. 
Station, Camp 59, Albuquerque ; latitude 35° 05' 50"; longitude 7h. 6m. 31.47s. 
Needle, B. Date, October 21, 1853. Dour of beginning, 12 h. 30m. p. m. ; hour of ending, 1 h. 15m. p. rti. 
Observers, Lieut. A. IF. Whipple and Lieut. J. C. Ives, Topographical Engineers. 
o ' " 
( 38 10 
Needle vertical, face of circle north, reading of azimuth circle. -_ I 38 22 
( 38 16 
( 38 35 
Needle vertical, face of circle south, reading of azimuth circle__-] 38 52 
( 38 52 
Reading of azimuth circle when plane of instrument is in the magnetic meridian_ 38 32 10 
Reading of azimuth circle when plane of instrument is in the true meridian.__ 51 54 51 
Approximate magnetic declination_____ 13 22 41E. 
OBSERVATIONS FOR MAGNETIC INCLINATION—No. 2. 
Face of circle. 
East. 
West 
Means 
Sum of means . 
Half sum = dip . 
Differences. 
Direct. 
o ' 
62 22 
62 20 
€2 28 
62 10 
62 25 
62 17 
62 20 20 
Half differences, or angles of de¬ 
flection ___ 
Dcf. N. 40° from dip. 
o ' 
at 22 20 
o ' 
79 60 
79 60 
79 58 
79 45 
79 50 
79 52 
o ' 
at 102 20 
o ' 
44 35 
44 37 
44 40 
44 35 
44 40 
44 48 
o ' " 
79 54 10 
44 IT 10 
o 
124 
33 
20 
o 
62 
16 40 
o 
35 
15 50 
o ' 
17 37 
30 
Def. S. 40° from dip. 
o ' 
at 22 20 
o ' 
80 60 
80 68 
80 62 
80 57 
80 60 
80 58 
o ' 
at 102 20 
o ' 
43 35 
43 30 
43 33 
43 32 
43 37 
43 40 
O ' " 
81 00 50 
43 "siT 30 
o 
124 
35 
20 
62 17 40 
37 17 40 
O / ,r 
18 43 10 
Results. 
o 
' 
" 
62 
20 
10 
62 
16 
40 
62 
17 
40 
62 18 10 
+ 8 48 
Or,. 
62 26 58 
Direct. 
■ By deflectors. 
Mean. 
- Index error. 
True inclination. 
