08 
MAGNETIC OBSERVATIONS, 
OBSERVATIONS—Continued. 
Station, Camp 70, Zuni river; latitude 35° 05' 41". 88; longitude 1h. 14m. 35. 56s. 
Needle, B. Date, November 21, 1853. Hour of beginning, 3 h. p. m.; hour of ending, 3h. 30 m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
o ' " 
f 88 35 
Needle vertical, face of circle north, reading of azimuth circle-- -j 88 44 
( 88 58 
i 88 45 
Needle vertical, face of circle south, reading of azimuth circle_ \ 88 60 
( 88 57 
Reading of azimuth circle when plane of instrument is in the magnetic meridian.... 88 49 50 
Reading of azimuth circle when plane of instrument is in the true meridian_...._ 102 13 24 
Approximate magnetic declination______ 13 23 34 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Face of circle. 
East. 
West. 
Means. 
Cor. for index error of needle — 
Deduced inclination.. 
Differences. 
Half diff. or angles of deflection. 
Sum of means . 
Half sum — dip. 
Direct. 
o i 
61 55 
61 50 
61 58 
61 55 
61 58 
61 57 
o ' a 
61 55 30 
Def. with wt. 2 gr. 
Def. towards 
the vertical. 
(1) 
87 50 
87 53 
•87 50 
87 48 
87 50 
87 47 
Def. from 
the vertical. 
( 2 ) 
o ' 
36 02 
36 08 
36 01 
36 02 
36 00 
36 08 
+ 8 48 
( (1) 87 49 40 l 
\ (2) 36 03 30 J 
o' " 
62 04 18 
o i " 
51 46 10 
o i u 
25 53 05 
o ' u 
123 53 10 
O ' II 
61 56 35 
Ther. 
Fah. 
73 
75 
o 
74 
Def. with wt. 2^ gr. 
Def. towards 
the vertical. 
( 1 ) 
94 15 
94 20 
94 25 
94 35 
94 30 
94 40 
Def. from 
the vertical. 
( 2 ) 
o i 
28 59 
28 60 
28 60 
28 50 
28 59 
28 55 
j (1) 94 27 30 | 
| (2) 28 57 10 j 
65 30 20 
32 45 10 
123 24 40 
61 42 20 
Ther. 
Fah. 
o 
73 
75 
74 
