98 MAGNETIC OBSERVATIONS. 
OBSERV ATIONS-— Continued, 
Station, Camp 70, Zuni river; latitude 35° 05' 41". 88; longitude Th. 14m. 35. 56s. 
Needle, B. Date, November 21, 1853. Hour of beginning, 3h. p. m.; hour of ending, 3h. 30m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
0 , " 
88 35 
Needle vertical, face of circle north, reading of azimuth circle | 88 44 
88 8 
88 45 
Needle vertical, face of circle south, reading of azimuth circle | 88 60 
88 57 
Reading of azimuth circle when plane of instrument is in t ti idi 88 49 50 
Reading of azimuth circle when plane of instrument is in the "5s meridian 102 13 24 
Approximate magnetic declination 13 23 34 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
x Def. with wt. 2 gr. ` Def. with wt. 23 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) 
o v» تی‎ ots; o , qe o 
61--55 87 50 36 02 73 94 15 28 59 73 
East |-761--50 87 53 96.08. ¿lus id 94 20 28 0۵0 Lara 
61 58 87 50 88 01 E 94 25 28. 60. . |... 
61 55 87 48 50:202 0و‎ 7 94 5 28 50 . |..------ 
West 61 58 87 50 26:700 و‎ 27 94 30 28 59  |....--.- 
61 57 87 47 36 08 75 94 40 28 55 15 
1 @ ^e" 0 1 7 o ° , H ° 
(1) 87 49 40 (I) 94 27 30 
Means 61 55 30 d Q) 36 03 30 74 | (D 38 57 10 74 
Cor. for index error of needle...| + 8 48 
eod 
Deduced inclination............ 62 04 18 
° 7 7 ° ` 7 
Differences DE M D A 757 65° 80 20 |-------- 
DECEM M es فک‎ el 
Half diff. or angles of deflection 25-539 95 ` T 6 39 48 19 © ی٦‎ 
o Hn à [e] e “ 
Sum of means ; 133 08 1B 9: 128 24 40 =  [|.------- 
E os rian B ^ 
Half sum — dip---- BEI 56:906. |. bue 61 42 20 sepe riim 
