| 
€ 
į 
Y 
MAGNETIC OBSERVATIONS. TH 
OBSERV ATIONS— Continued, 
Station, Camp TT, near Rio Puerco of the West ; latitude 340 57" 506۳.58 ; longitude Th. 19m. 28.825. eh 
Veedle, B. Date, December 3, 1853. Hour of beginning, 4h. 10m. p. m.; hour of ending, 4h. 35m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
[e] 1 " 
۰ ç 55 56 
Needle vertical, face of circle north, reading of azimuth circle 55 
i ۸ 55 و‎ 
e $ 55 59 
Needle vertical, face of circle south, reading of azimuth circle 55 60 
( s 7 
Reading of azimuth circle when plane of instrument is in the magnetic meridian 55 58 30 
Reading of azimute circle when plane of instrument is in the true meridian 69 58 35 
Approximate magnetic declination 14 00 05E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY —No. 4. 
Def. with wt. 2 gr. | Def. with wt. 2} gr. 
Face of circle. Direct. 
Def. towards| Def. from Ther. | Def. towards | Def. from Ther. 
the vertical. | the vertical. | Fah. | the vertical. | the vertical. | Fah. 
(1) (2) 2) 
Deg D. 7 Og ۲ | o e 9.» o 
$ 61 35 87 40 85 20 | 62 94 33 28 28 62 
East .... 61 38 8T 42 85.138 al | 94 40 ` EE A 
(| 61 40 87 43 85: mctu | 9 30 "et o scs 
| | 
61 40 8T 40 867 20 و‎ E | 94 32 NEN XE 6ع‎ 
West 61 35 87 33 o - cw ۰. WR ec 
61 36 87 30 suu 20 | 2 | 94 36 28 10 62 
| | 
O , "m , ” | o , " [e] 
(1 87 38 00 1 (1) 94 35 10 | 62 
Means 61 $7 3 (2) 21 00 62 (2) : 28 19 30 
Corr. for index error of needle..| + 8 48 | D | | in| 
| i t 
Deduced inclination ----------- 61 46 08 | | | 
| o , " | o , " i 
Differences 52 17 00 | EE 66 15 40 | خی‎ ge 
| | 
La , " | O , ” 
Half diff. or angles of deflecti 26 08 30 EAS c 33. 07. 60... EE سے‎ 
° ” | o 7 ” 
Sum of means 3۳ e e A APA 122 54 Mus dre 
° , ” | o , " 
Half sum — dip TES BEES | AN من‎ 
