112 MAGNETIC OBSERVATIONS. 
OBSERVATIONS—Continued. 
Station, Camp 78, Colorado Chiquito ; latitude 349 53' 01".95 ; longitude Th. 20m. 14.22s. 
Needle, B. Date, December 5, 1853. Hour of beginning, 2h. 45m. p. m. ; hour of ending, 3h. 30m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
O ۳ tr 
9 53 
Needle vertical, face of circle north, reading of azimuth circle | 9. 49 
i 9 43 
9: 41 
Needle vertical, face of circle south, reading of azimuth circle 9 44 
; "H 44 
Reading of azimuth circle when plane of instrument is in the magneti idi 9 45 40 
Reading of azimuth circle when plane of instrument is in the true meridian 23 26 02 
Approximate magnetic declination 13 40 22 E. 
\ 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. 2 gr. Def. with wt. 2} gr. 
Face of circle. Direct. 5 
Def. towards| Def. from Ther. |Def. towards| Def. from Ther. 
the vertical. | the vertical. | Fah. | the vertical. | the vertical. | Fah. 
(1) (2) (1) (2) 
o 1 0 7 o ' o 0 , [e] , o 
62 03 88 20 35 0 72 94 58 28 57 72 
East 62. 05 88 25 382 99 ہے‎ ra 94 50 AR DD capos 
62 10 88 10 Jas GU 1.0528 94 65 285 89 >=: bue 5 
62 10 88 00 sa DU lui. Lo 94 55 28 00 5 مات سا‎ ize 
West 62 06 88 12 400: Lee, ER 94 58 28.413 | ¿ile 
62 05 88 03 35 55 72 94 60 28 55 72 
o 1 “ “ [9] o , ” o 
d (2) 35 57 00 9 (2 28 53 50 a 
Cor. for index error of needle-.-| + 8 48 
EE ہے تک و‎ 
Deduced inclination. ---------- 62 15 18 
3 Cis teg ^" o 7 7 
Differences -| 52 14 40 G6. 03 ` 50. و‎ ss 
1 M o 1 “ | 0 , ” 
Half diff. or angles of deflection 26 07 20 MR ass, EE et SE SE 
| 
[0] D Zë $ ” 
Sum of means RaQ: 08748" Lol 1339 BI 30 عوسی شاد‎ 
O , " [e] , "m 
Half sum — dip Of: M 30 — سے و ال"‎ 61 65 4b. . Lawcses- 
"e 
ii 1 
