108 
MAGNETIC OBSERVATIONS, 
OBSERVATIONS—Continued. 
Station, Camp 75, CarrisQ Creek ; latitude^ 5° 0G' 32".35 ; longitude 7 h. 18m. 08.08s. 
Needle, B. Date, December 1. 1853. Hour of beginning, 4 li. p. m.; hour of ending, 4h. 30 m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineer's. 
O ' " 
f 38 48 
Needle vertical, face of circle north, reading of azimuth circle._...... -j 38 32 
( 38 41 
f 38 42 
Needle vertical, face of circle south, reading of azimuth circle....... -j 38 40 
( 38 30 
Reading of azimuth circle when plane of instrument is in the magnetic meridian__ 38 38 50 
Reading of azimuth circle when plane of instrument is in the true meridian__ 52 32 31 
Approximate magnetic declination_ 13 53 41 E. 
OBSERVATIONS EOR 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. 
Fall. 
Def. with wt. 2| gr. 
Def. towards 
the vertical. 
(1) 
Def. from 
the vertical. 
( 2 ) 
Ther. 
Fah. 
East. 
West, 
o ' 
01 55 
61 58 
61 60 
61 53 
61 58 
61 60 
Means., 
61 57 20 
Cor. for index error of needle... 
Deduced inclination.. 
Differences . 
Half diff. or angles of deflection.. 
Sum of means. 
Half sum — dip.. 
+ 8 48 
62 05 08 
o / 
87 58 
87 55 
87 60 
87 50 
87 48 
87 53 
o ' 
35 40 
35 45 
35 55 
35 50 
35 48 
35 53 
o 
61 
61 
o ' 
94 35 
94 55 
94 45 
94 40 
94 50 
94 45 
o ' 
28 45 
28 48 
28 45 
28 35 
28 40 
28 38 
j (1) 87 54 00 ) 
j (2) 35 48 30 f 
o 
61 
j (1) 94 45 00 l 
j (2) 28 41 50 \ 
52 05 30 
O / " 
66 03 10 
26 02 45 
o ' " 
33 01 35 
123 42 30 
123 26 50 
61 51 15 
61 43 25 
o 
61 
61 
o 
61 
