| MAGNETIC OBSERVATIONS. 129 
OBSERVATIONS — Continued. 
Station, Camp 109, Branch of White Cliff Creek ; latitude 350 12! 26”. 50 ; longitude Th. 33m. 25. 45s. 
Needle, B. Date, January 30, 1854. Hour of beginning, 4h. 45m. p. m. ; hour of ending, 5h. p. ۰ 
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 
T 
es 
ES 
= 
Reading of azimuth circle when plane of instrument is in the ti idi 13 42 00 
Reading of azimuth circle when plane of instrument is in the true dps run 
Approximate magnetic declination 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY —No. 4. 
Def. with wt. 2 gr. Def. with wt. 2} gr. 
Face of circle. Direct. 72 0 
Def. towards | Def. from the Ther. | Def. towards | Def. from the| Ther. 
the vertical. vertical. Fah. |the vertical. vertical. Fah. 
(1) (2) (1) (2) 
° 7 o H [e] 1 0 o 7 o i o 
$ 61 10 81 0 34 45 54 94 10 87 393 54 
East 61 19 87 30 E Loss 94 18 2a B Loue 
(| 61 08 87 25 ÁN LLL s 94 12 EUN Loos 
$ 61 00 87 20 کہ‎ TI a s s M ub ای وی‎ MO s 
West 61 00 Bt: 15 SE ` U E ہر‎ 484 Sh —1. AL 39 oo 
《| 61 5 87 20 34 55 54 94 10 | 2 25 54 
o , “ ° 1 7 o [e] H tu [e] 
1) 87 23 20 (1) 94 15 00 | i 
zg oo | زو‎ sa 49 وو‎ tl ۵ | & 27 29 20 aie 
1 Ze 
Cor. for index error of needle...| 十 8 48 
° / u 
Deduced inclination........... 61 14 18 
° 1 “ o , tr 
Differences 52. ` QQ اد ات‎ OF. 15 — dU Loses. 
° 7 Hu ° , ot 
Half diff. or angles of deflection 26 17 00 E. i 58 5. بس سا‎ 
o 1 a o 1 $" x 
Sum of means. 122 12 O m a 131 44 120. Loi 
° 1 7 ° DH " 
Half sum — dip (C M XM 5^ ewe ewe G0 jO 2M PA 
Night cloudy ; no observations for declination. 
17 m 
