124 
MAGNETIC OBSERVATIONS. 
OBSEKVATIONS—Continued. 
Station. Camp 96, Cedar Creek; latitude 35° 20' 35". 09; longitude Th. 29 m. 18.27s. 
Needle, B. Date, January 9, 1854. Hour of beginning, 3 h. 30 m. p. m. ; hour of ending , 4A. p. m. 
Observer, 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_____ 
o 
34 
60 
34 
50 
34 
62 
34 
53 
34 
54 
34 
52 
34 
55 
10 
48 
44 
16 
13 
49 
06 
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 ) 
Def. towards 
the vertical. 
(1) 
Def. from 
the vertical. 
(2) 
O ' 
O ' 
102 45 
20 42 
102 35 
■ 20 40 
102 45 
20 40 
102 35 
20 35 
102 25 
20 37 
102 30 
20 30 
Def. with wt. 3 gr. 
East 
West. 
Means . 
Cor. for index er¬ 
ror of needle.. 
Deduced inclina¬ 
tion . 
Differences. 
Halfdiff or angles 
of deflection._ 
Sum of means- 
Half sum = dip. 
o ' 
61 55 
61 60 
61 58 
61 60 
61 59 
61 54 
o ' 
87 50 
87 50 
87 55 
87 55 
87 57 
87 50 
o ' 
35 50 
35 48 
35 45 
35 50 
35 47 
35 55 
o 
44 
44 
o ' 
94 45 
94 50 
94 40 
94 55 
94 50 
94 45 
o ' 
28 40 
28 35 
28 35 
28 40 
28 30 
28 40 
o ' " 
61 57 40 
(1) 87 52 50 
(2) 35 49 10 
o 
44 
(1) 94 47 30 
(2) 28 36 40 
(1) 102 35 50 ) 
(2) 20 37 20 | 
+ 8 48 
o < " 
62 06 28 
52 03 40 
26 01 50 
123 42 00 
61 51 00 
66 10 50 
81 58 30 
33 05 25 
40 59 15 
123 24 10 
123 13 10 
61 42 05 
61 36 35 
