108 
MAGNETIC OBSERVATIONS. 
OBSERV ATIONS— Continued. 
Station, Camp 75, Carriso Creek ; latitude 359 06' 32".35 ; longitude Th. 18m. 08.088۰ 
Hour of beginning, 4h. p. m.; hour of ending, 4h. 30m. p. m. 
Needle, B. Date, December 1, 1853. 
Observer, Lieut. J. C. lves, Topographical Engineers. 
0 H " 
38 48 
Needle vertical, face of circle north, reading of azimuth circle | 38 32 
38 41 
j 38 42 
Needle vertical, face of circle south, reading of azimuth circle 38 40 
Š l- a وو‎ 
Reading of azimuth circle when plane of instrument is in t ti li 38 38 50 
Reading of azimuth circle when plane of instrument is in the ës meridian 52 382 1 
Approximate magnetic declination 13 53 ALE 
| 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY —No. 4. 
Def. with wt. 2 gr. Def. with wt. 21 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) (1) (2) 
G ہے‎ o ار‎ d 2 o 0 , O 4 0 
61 55 87 58 35 40 61 94 35 28 45 61 
East 61 58 87 55 IOS" (ORIS Pop 94 55 28 48  |..------ 
61 60 87 60 30:59. E 94 45 28 45 ]|...----. 
61 53 8T 50 oO. 04 pho 94 40 28 35 |-------- 
West 61 58 87 48 EK سا بت | 40 28 0 94 0 ->.ء فو‎ 
61 60 87 53 35 53 61 94 45 28 38 61 
[e] , ” h- a H " 0 o 7 O 
Maid (1) 87 54 00 ^£ 0) 94 45 00 61 
»- SS 1 (2) 35 48 0 = (2) 28 41 50 
Cor. for index error of needle...| + 8 48 
0 , ” e 
Deduced inclination............| 62 05 08 
[e] , ” o 7 n 
Differences i Td uoc 66 08 18  |.------ 
i > 0 , " o , KI 
Half diff. or angles of deflecti ZG $us ho e AN NE E 
O , " OH , "n 
Sum of means E Proa "ER NEE 123 26 50 |-------- 
° , ” [o] , fr 
Half sum — dip کہ‎ Budd La t i 9 u L... 
