MAGNETIC OBSERY ATIONS. 135 
OBSERV ATIONS—Oontinued. 
Station, Camp 117, Williams River ; latitude 340 32' 29". 60 ; longitude Th. 33m. 50. 305. 
Needle, B. Date, February 9, 1854. Hour of beginning, 2h. 30m. p. m. ; hour of ending, 2h. 55m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
82 00 
Needle vertical, face of circle north, reading of azimuth circle 82 2 
- 82 15 
A 
$ 82 10 
| Needle vertical, face of circle south, reading of azimuth circle ? po a 
Reading of azimuth circle when plane of instrument is in the ti idi 82 08 20 
| Reading of azimuth circle when plane of instrument is in the ee meridian 96 06 18 
| Approximate magnetic declination 13 57 58 E. 
I 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. 2 gr. Def. with wt. 23 gr. Def. with wt. 3 gr. 
Face of circle. Direct. 
Def. towards | Def. from the| Ther. | Def. towards | Def. from the| Def. towards Def. from the 
the vertical. vertical. Fah. | the vertical. vertical. the vertical. vertical. 
(1) (2) (1) (2) (1) 2 
| 
Ww cr o , ° , ° ° , | o , [e] , Be 
60 33 87 20 33 50 78 94 58 | 26 30 102 60 18 05 
East. $ 60 35 87 25 a 90 L... 94 55 25 102 45 18 12 
d 60 35 87 25 WEE. ` w 94 45 | 26 28 102 58 18 15 
60 38 87 15 i. Ae, E DE 94 55 | 26 25 102 50 18 05 
Wak مت‎ 60 38 87 30 EL 67 94 40 26 102 45 18 15 
60 30 87 20 33 0 78 94 50 26 20 102 55 18 905 
| ! 
۲ H ? " [e] 7 7 o o 7 7 Ss š be 
eans. D S^ 23 30 (1) 94 30 } j (1 0 } 
ری وٹ‎ + is PR i Q 33 51 10 | 9 | e 26 27 10 (2 18 09 30 
€ we E ی‎ 
sedie ...... + 8 48 
Deduced inclina- | o » r 
f Hem, 60 43 38 
| ° 7 Li o P. DI o , و‎ 
۱ Differences تہ‎ ee o Li. 68 23 20 84 42 40 
" ° , ” 
Half diff. or 1 o r o t 
of par ng T 26 2045 £ — LL. 34 11 40 43. 213 8 
i o , ” o ? "HU 0 , 好 
Sum of means Blood a 1381 wv 40 121 01 40 
o D rr Oo , 7 0 7 Ze 
EE 60 5390 $  ¿--.-- 60 38 -50 60 30 50 
