82 
MAGNETIC OBSERVATIONS. 
OBSERVATIONS—Continued. 
Station, Albuquerque, Camp 59 ; latitude 35° 5' 50"; longitude Ih. 6m. 31.47 s. 
Needle, C. Date, October 17, 1853. Hour of beginning, Vi. 30m. p. m. ; hour of ending, 2h. 30 m. p. m. 
Observers, Lieut. A. W. Whipple and Lieut. J. C. Lues, Topographical Engineers. 
Needle vertical, face of circle north, reading of azimuth circle 
Needle vertical, face of circle south, reading of azimuth circle 
Mean_ 
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 
/ 
„ 
o 
t ft 
38 
25 
38 
49 
38 
5 
38 
40 
38 
14 
38 
20 
38 
23 
38 
25 
38 
51 
38 
50 
38 
45 
38 
13 
38 
27 
10 
38 
32 50 
38 
32 
50 
38 
30 
00 
51 
53 
14 
13 
23 
14 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION—No. 1. 
Face of circle. 
With marked end of needle, N. 
pole. 
Thermometer, 
Fahrenheit. 
With marked end of needle, S. 
pole. 
Thermometer, 
Fahrenheit. 
North end of 
needle reads— 
South end of 
needle reads— 
North end of 
needle reads— 
South end of 
needle reads— 
East_| 
O ' " 
62 15 
62 28 
62 25 
62 30 
62 28 
62 37 
O ' " 
62 18 
62 30 
62 30 
62 30 
62 28 
62 30 
o 
76 
O ' " 
62 38 
62 33 
62 25 
62 35 
62 45 
62 37 
O ' " 
62 33 
62 28 
62 22 
62 35 
62 40 
62 40 
0 
West.| 
72 
Means_ 
76J 
62 27 10 
62 27 40 
62 35 30 
62 33 00 
Mean of 4 results_62° 30' 50" 
Station, Camp No. 59, Albuquerque. Date, October 17, 1853. 
OBSERVATIONS ON POLARIS. 
Face of circle. 
Whether observations 
are direct or by re¬ 
flection. 
Time of observa¬ 
tion by chrono¬ 
meter, No. 2475. 
Read’g of azi¬ 
muth circle. 
Computed azi¬ 
muth of Po¬ 
laris. 
Reading of azimuth 
circle when plane of 
instrument is in the 
true meridian. 
West.| 
East_| 
Direct_ 
h m. s. 
3 21 30.5 
O ' 
52 40 
o ' " 
1 00 13 
o ' " 
51 39 47 
3 29 22.6 
53 10 
1 03 19 
Direct_ 
52 6 42 
Reading of azimuth circle when plane of instrument is in the true meridian, by mean of two ohservat’ns. 
51 53 14 
Error of chronometer -f- 1m. 17s. 
