MAGNETIC OBSERVATIONS, 
109 
OBSERVATIONS—Continued. 
Station, Camp 76, near Lithodendron Creek; latitude 35° 02' 07". 83 ; longitude 7 h. 18m. 43.26s. 
Needle, B. Dale, December 2, 1853. Hour of beginning, 4/j. p. m. ; hour of ending, 4/t. 30m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
o / n 
1 56 36 
Needle vertical, face of circle north, reading of azimuth circle___../ 56 50 
( 56 37 
( 56 34 
Needle vertical, face of circle south, reading of azimuth circle...■? 56 23 
( 56 52 
Reading of azimuth circle when plane of instrument is in the magnetic meridian._ 56 38 40 
Reading of azimuth circle when plane of instrument is in the true meridian_ 70 11 18 
Approximate magnetic declination_ 13 32 38 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 / 
61 45 
61 45 
61 55 
61 48 
61 45 
61 50 
o / '/ 
61 48 00 
4- 8 48 
O'" 
61 56 48 
Def. with wt. 2 gr. 
Def. towards 
the vertical. 
( 1 ) 
87 30 
87 35 
87 40 
87 30 
87 55 
87 58 
Def. from the 
vertical. 
( 2 ) 
o ' 
35 33 
35 35 
35 40 
35 30 
35 30 
35 35 
j (1) 87 41 20 ) 
j (2) 35 33 50 j 
o 
52 
07 30 
o 
26 
03 45 
123 15 10 
61 37 35 
Ther. 
Fah. 
59 
59 
o 
59 
Def. towards 
the vertical. 
( 1 ) 
o ' 
94 50 
94 40 
94 40 
94 55 
94 45 
94 40 
Def. from the 
vertical. 
( 2 ) 
o " 
28 29 
28 25 
28 28 
28' 25 
28 20 
28 28 
j (1) 94 45 00 ) 
j (2) 28 25 50 j 
o 
66 
19 10 
o 
33 
09 35 
123 10 50 
61 35 25 
Ther. 
Fah. 
o 
59 
59 
