MAGNETIC OBSERVATIONS, 
125 
OBSERVATIONS—Continued. 
Station, Camp 103, Pueblo Creek; latitude 34° 56' 31"; longitude 7 h. 31 m. 04.60s. 
Needle, B. Date, January 21, 1854. Hour of beginning, 3h. p. m. ; hour of ending, 3 h. 40 m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
o ' " 
f 17 25 
Needle vertical, face of circle north, reading of azimuth circle.-j 17 50 
( 17 33 
f 17 28 
Needle vertical, face of circle south, reading of azimuth circle.-< 17 44 
( 17 41 
Reading of azimuth circle when plane of instrument is in the magnetic meridian -- 17 36 50 
Reading of azimuth circle when plane of instrument is in the true meridian.. 31 36 14 
Approximate magnetic declination------ 13 59 24 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Face of circle. 
Direct. 
Def. with wt. 2 gr. 
Def. towards 
Def. from the 
Ther. 
the vertical. 
vertical. 
Fah. 
(1) 
(2) 
O U 
O / 
o 
87 40 
34 40 
45 
87 45 
34 55 
87 30 
34 40 
87 30 
34 45 
87 33 
34 35 
87 40 
34 40 
45 
Def. with wt. 2\ gr. 
Def. towards 
vertical. 
( 1 ) 
Def. from the 
vertical. 
( 2 ) 
Def. with wt. 3 gr. 
Def. towards 
the vertical. 
( 1 ) 
Def. from the 
vertical. 
( 2 ) 
East.. 
West. 
Means. 
Differences. 
Half diff. or angles 
of deflection 
Sum of means. 
61 05 
61 07 
61 05 
61 03 
61 00 
61 05 
o / // 
61 04 10 
Corr. for index er¬ 
ror of needle_ 
Deduced inclina¬ 
tion _ 
-f 8 48 
o III 
61 12 58 
o ' 
94 12 
94 30 
94 15 
94 25 
94 25 
94 20 
o / 
27 28 
27 20 
27 25 
27 30 
27 25 
27 20 
102 07 
102 25 
102 15 
102 15 
102 20 
102 17 
o / 
19 15 
19 10 
19 12 
19 15 
19 12 
19 10 
(2) 34 42 30 
o 
45 
J ( ] 
1 
(2) 27 24 40 
j (1) 102 16 30 } 
j (2) 19 12 20 \ 
52 53 50 
o / II 
66 56 30 
83 04 10 
o 
26 
26 55 
o 
122 
18 50 
0/1/ 
33 28 15 
O ' " 
121 45 50 
o 
61 
09 25 
60 52 55 
41 32 05 
121 28 50 
60 44 25 
Half sum :_: dip 
