MAGNETIC OBSERVATIONS.. | 91 
OBSERV ATIONS— Continued. 
Station, Camp 63, Rio Rita ; latitude 35° 01' 097.91 ; longitude Th, 8m. 57. 18s. 
Needle, B. Date, November 12, 1853. Hour of beginning, 10 a. m. ; hour of ending, 10h. 45m. a. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
o D " 
š š í 82 08 
Needle vertical, face of circle north, reading of azimuth circle 82 20 
| : bo 09 
| { 81 41 
Needle vertical, face of circle south, reading of azimuth circle 82 05 
( aa 
Reading of azimuth circle when plane of دس‎ is in the magnetic meridian EE 81 57 40 
Reading of azimuth circle when plane of instrument is in the true meridian 95 43 38 
Approximate magnetic declination 13 45 58 E 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. 1 gr. Def. with wt. 1} gr. 
Face of circle. ہی‎ ka DIP ۳ 
Def. towards às Det. et Ther. | Def. موی‎ | Det. ین‎ a the) Ther. 
the vertical. Fah. | the ioe Fah. 
- 0 ` d (1) SCH 
b. Lor , y Gy 0 o. x 0 y o 
63 08 15 33 50 35 70 s2 08 | 44 20 69 
East... 63 05 75 45 OA LC UM BN" Se جو‎ e سے وس‎ 
63 0 75 8 09ج‎ 25/ ` E سے سے‎ | 82 1 e > gn eee 
63 15 75 45 M AR Lum us "SR E me CHER 
West 63 10 15 48 | jpg 390 |-------- | 82 16 ^| 44 10 [......- 
63 05 75 40 50 07 | 78 | 81 55 | 44 15 15 
1 | | | 
[e] poH ۲ 0 d " | | , ” 9 
۱ () 75 40 40 | (D 82 08 40 | 
Means 63 08 50 V o 50 25 50 | ^ 1 (2 44 10 50 ” 
4 Moda dm 
ps n | 
Cor. for index error of needle...| + 8 48 
Gau 
Deduced inclination 63 17 38 
o , " [e] , " 
Difleraneos. o5 c4 وک‎ e e| سا‎ lacus 2b 14 50 — |-------- 37 57 50 - 
E O , ” 2 Oo , " 
i Half ditt. or angles of deflection... ` BOS |...———— js 58 56. سس شا‎ 
0 , " r ” 
i Pun of means. a o [oo i e TE WM o [a 126 I A سے یما‎ 
一 一 一 Ee 
| o r ” | | o e e 
l } BP WW ^ 999287720 
Half sum — dip و‎ am 63 03 15 >> 63 
