92 
MAGNETIC OBSERVATIONS 
OBSERVATIONS—Continued. 
Station, Camp 64, Covera; latitude 35° 05' 22". 10 ; longitude 1h. 09m. 45s. 
Needle, B. Date, November 14, 1853. Hour of beginning, 2 h. 30m. p. m. ; hour of ending, 3 h. 15m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
o ' n 
I 56 36 
Needle vertical, face of circle north, reading of azimuth circle -.1 56 52 
( 56 35 
1 57 10 
Needle vertical, face of circle south, reading of azimuth circle_ -J 57 12 
( 57 05 
Reading of azimuth circle when plane of instrument is in the magnetic meridian_ 56 55 00 
Reading of azimuth circle when plane of instrument is in the true meridian___ 70 44 18 
Approximate magnetic declination_._ ._ ._ 13 49 18 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Face of circle. 
Direct. 
Def. with wt. 2 gr. 
Def. towards 
the vertical. 
(1) 
Def. from 
the vertical. 
( 2 ) 
Ther. 
Fah. 
Def. with wt 2| gr. 
Def. towards 
the vertical. 
( 1 ) 
Def. from 
the vertical. 
( 2 ) 
Ther. 
Fah. 
East. 
West- 
Means. 
Cor. for index error of needle.. 
Deduced inclination.. 
Differences , 
Half diff. or angles of deflection. 
Sum of means. 
Half sum = dip.. 
o ' 
62 20 
62 15 
62 23 
62 20 
62 18 
62 10 
o ' " 
62 17 40 
I u 
+ 8 48 
O ' " 
62 26 28 
o ' 
87 45 
87 50 
87 55 
88 03 
88 05 
88 00 
o ' 
36 25 
36 20 
36 23 
36 32 
36 25 
36 28 
o 
76 
81 
o ' 
94 45 
94 40 
94 25 
94 45 
94 35 
94 38 
o ' 
29 23 
29 20 
29 18 
29 05 
29 20 
29 17 
j (1) 87 56 20 ) 
j (2) 36 25 30 j 
o 
78. 5 
j (1) 04 
i (2) 29 
38 
17 
00 
10 
30 50 
o 
65 
20 50 
25 45 25 
32 40 25 
124 21 
50 
123 55 10 
62 10 
55 
61 57 35 
o 
76 
81 
78.5 
