152 
MAGNETIC OBSERVATIONS. 
OBSERVATIONS—Continued. 
Station, Camp 142, Soda Lake ; latitude 35° 03' 13".20 ; longitude 7h. 43 m. 55. 06s. 
Needle, B. Date, March 8, 1854. Hour of beginning, 4Ji. 50 in. p. m. ; hour of ending, 5 h. 20 m. p. m. 
Observer, Lieut. J. C. Ives, Top/ographical Engineers. 
O ' " 
f 45 40 
Needle vertical, face of circle north, reading of azimuth circle..—..4 45 40 
( 45 30 
f 45 20 
Needle vertical, face of circle south, reading of azimuth circle. 4 45 45 
(. 45 40 
Reading of azimuth circle when plane of instrument is in the magnetic meridian. 45 35 50 
Reading of azimuth circle when plane of instrument is in the true meridian. 59 26 49 
Approximate magnetic declination...... 13 50 59 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. gr. j Def. with wt. 3 gr. 
Face of circle. 
East. 
West. 
Means. 
Cor. for index error of needle... 
Deduced inclination. 
Differences. 
Half diff. or angles of deflection 
Sum of means . 
Direct. 
Def. towards 
the vertical. 
(1) 
Def. from 
the vertical. 
(2) 
O ' 
60 55 
60 60 
60 58 
O ' 
94 35 
94 42 
94 43 
O ' 
26 50 
26 50 
26 48 
60 58 
60 59 
60 58 
94 35 
94 45 
94 40 
26 40 
26 50 
26 40 
O ' " 
GO 58 00 
o 
j (1) 94 
1 (2) 26 
40 00 ) 
46 20 j 
+ 8 48 
o ' " 
61 06 48 
o 
67 
53 40 
o 
33 
56 50 
o 
121 
26 20 
Half sum — dip . 
o ' " 
60 43 10 
Ther. Def. towards 
Falrr. the vertical. 
(1) 
o O' 
71 102 50 
. 102 50 
.! 102 48 
. 102 50 
. 102 45 
71 102 50 
o 
71 
Def. from 
the vertical. 
( 2 ) 
o ' 
18 35 
18 38 
18 33 
18 22 
18 30 
18 30 
(1) 102 48 50 
(2) 18 31 20 
84 17 30 
o ' " 
42 08 45 
o ' " 
121 20 10 
o 1 " 
60 40 05 
Fah. 
Ther. 
o 
71 
71 
o 
71 
