114 MAGNETIC OBSERVATIONS. 
OBSERV ATIONS— Continued, 
Station, Camp 80, Colorado Chiquito ; latitude 340 59' 39". 19 ; longitude Th. 21m. 40. 60s. 
eedle, B. Date, December T, 1853. Hour of beginning, 3h. 30m. p. m. ; hour of ending, 4h. p. m. 
Observer, Liew. J. C. Ives, Topographical Engineers. 
0 , " 
24 16 
Needle vertical, face of circle north, reading of azimuth circle 94 17 
24 20 
24 21 
Needle vertical, face of circle south, reading of azimuth circle 24 15 
24 35 
Reading of azimuth circle when plane of instrument is in the ü idi 24 20 40 
Reading of azimuth circle when plane of instrument is in the UIS meridian 38 00 19 
Approximate magnetie declination 13 39 39 E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. 2 gr. Def. with wt. 23 gr. 
3 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) 
ہے‎ o P کے‎ 2 ° Go و‎ e v y o 
61 40 87 51 85 30 58 94 45 28 20 58 
East 61 48 87 60 | do ag hol. 94 55 28 dO Tor d 
61 50 87 58 | 20798 a کا کی کی فی مو 20 8 45 94 کر‎ 
61 7 8S 5d MM 94 8 38. ۰ Loses 
West 61 40 87 45 25-80 ےس تی جا ای‎ 94 40 28 20 1:55 lm 
61 45 87 40 935 33 60 94 50 28 25 60 
o , " ° , ” ° 1 ” o 
vw (1) 87 51.40 (1) 94 47 10 
cans F پت ھب‎ | (2 35 30 50 59 (2) 28 22 30 s 
Cor. for index error of needle---| 十 8 48 
0 D "m 
Deduced inclination 61 53 48 
o , "n o 7 " 
Differences 02-20-50 SO o nu 66 24 40  [|..------ 
; o , Mi [e] 4 D 
Half diff. or angles of deflection £306 سس‎ EE 3 9 0 ی میا‎ 
[e] , “ 1 ” 
Sum of means [v St oe my "EN 123 09 40 — |------== 
O " ° , ” 
Half sum — dip ھا 4 وم‎ - hoo E MI Lo : 
سسب ا‎ 
