86 
MAGNETIC OBSERVATIONS, 
OBSERVATIONS—Continued. 
Station, Camp 59, Albuquerque; latitude 35° 5' 50"; longitude 7A. 6 m. 31.47s. 
Needle, C. Date, October 20, 1853. Hour of beginning, 4 h. 30 m. p. m. ; hour of ending, 5h. 15m. p. m. 
Observers, Lieut. A. W. Whipple and Lieut. J. C. Ives, Topographical 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__ 
Marked end S. P. Marked end N. P. 
o 
' " 
o 
/ n 
38 
57 
38 
33 
38 
27 
38 
02 
38 
47 
38 
30 
38 
19 
38 
67 
37 
49 
38 
17 
38 
15 
38 
44 
38 
25 40 
38 
32 10 
38 
25 40 
o 
' 
" 
38 
28 
54 
55 
51 
51 
. 13 
25 
56 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION—No. 1. 
Face of circle. 
With marked end of needle, N. 
pole. 
North end of 
needle reads— 
South end of 
needle reads— 
V V 
O K 
a> ci 
With marked end of needle, S. 
pole. 
North end of 
needle reads— 
South end of 
needle reads— 
O O 
o a 
rH <U 
H f-i 
<D H 
West.. 
East. 
Means. 
o ' 
62 25 
62 28 
62 27 
62 25 
62 33 
62 18 
o ' 
62 21 
62 32 
62 25 
62 28 
62 36 
62 20 
o 
76 
72 
o ' 
62 30 
62 28 
62 43 
62 25 
62 13 
62 13 
o ' 
62 30 
62 21 
62 40 
62 28 
62 15 
62 10 
62 26 
62 27 
74 
62 25 20 
62 24 
o 
76 
72 
74 
Mean of 4 results 
62° 25' 35". 
