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MAGNETIC OBSERVATIONS, 87 
OBSERVATIONS—Continued. 
Station, Camp 59, Albuquerque ; latitude 350 5’ 50" ; longitude Th. 6m. ۰ 
Needle, B. Date, October 21, 1853. Hour of beginning, 11h. 30m. a. m.; hour of ending, 12h. 30m. p. m. 
Observers, Lieut. A. W. Whipple and Lieut. J. C. Ives, Topographical Engineers 
[e] , ” 
38 16 
Needle vertical, face of circle north, reading of azimuth circle 38 2 
38 16 
38 35 
Needle vertical, face of circle south, reading of azimuth circle 38 52 
` 88 52 
Reading of azimuth circle when plane of instrument is in the magnetic meridian 38 32 10 
Reading of azimuth circle when plane of instrument is in the true meridian 51 54 51 
Approximate magnetic declination 13 22 41 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
| Def. with wt. 2 gr. Def. with wt. 3 gr. 
Face of circle. Direct. 
j Def. towards | Def. from Ther. ds| Def. from Ther. 
the vertical. | the vertical | Fah. | the vertical | the vertical. | Fah. 
(1) (2) (1) (2) 
o , o , ° , o ° , 0 , o 
62 22 87 62 36 22 72 102 17 21 32 73 
p FC 62 20 87 58 AU و‎ Rep Sh 102 7 Ae | فد مه دا‎ 
62 28 87 65 ہا‎ 11 5. 102 25 Ji 49 i1... 
62 10 87 55 325 7199]. 22255. 102 28 21 OO n 
West 62 25 87 65 EE Lau ی‎ 102 20 ZE. 48- [LL 
62 17 8T 47 36 30 74 102 18 21 51 75 
* ° , " o , ” 
(1) 87 58 40 } رت‎ 102 22 30 } 
Means 62 20 20 1 (2) 36 18 30 73 ری‎ 21:37. 20 Ve 
, ” o , " 
Differences DI 49 dO. -— 77 E 4 14 uoo 
[9] , , 0 r " 
Half diff. or angles of deflection. .......- ---- 25:80 $ + — p 4 M 86 1.——— 
LJ 
> [9] " 0 , H 
Sum of means HET U pl MS 509 50.  Á LJ... caos 
o , Zë o , H 
Half sum — dip E ا‎ - p[.-—--- 61 59: 55 ^ JB. 
