138 
MAGNETIC OBSERVATIONS. 
š OBSERVATIONS—Continued. 
Station, Camp 122, Williams’ River ; latitude 340 12! 321, 40; longitude Th. 34m. 12. 195. 
Needle, B. Date, February 15, 1854. Hour of beginning, 5h. p. m. ; hour of ending, 5h. 20m. p. m. 
Observer, Lieut. J. C. Ives, Topographical Engineers. 
O r " 
64 06 
Needie vertical, face of circle north, reading of azimuth circle 64 06 
64 08 
64 04 
Needle vertical, face of circle south, reading of azimuth circle 64 00 
64 05 
Reading of azimuth circle when plane of instrument is in the magnetic 64 04 50 
Reading of azimuth circle when plane of instrument is in the true meridian TT - 45-31 
Approximate magnetic declinati 13 40 41E. 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. 23 gr. 
Def. with wt. 3 gr. 
Face of circle. Direct. E aE EO و سک‎ ER ¿ | 
Def. towards | Def. from the| "Ther. | Def. towards | Def. from the | Ther. 
the vertical. vertical. Fah. the vertical. vertical. Fah. 
(2) 
o , [6] , 0 2 0 0 , O 7 o 
59 58 93 658 e 25 58 56 102 20 17 *45 56 
East 59 58 93 -6 sd AN coll. 102 20 iT O0 e 
59 60 93 55 vov WAL Longi e RM 102 30 17-00. ED 
ç 59 60 93 60 250. E 102 20 VIA L. ات یم‎ 
West ` 59 8 93 8 29 DD Lo RI 102 . 15 IT 456 a 
d 59 60 93 58 25 50 56 102 15 17 40 56 
0 , n ” o > , ” o 
M (1) 93 58 10 (1) 102 20 00 
-— oo sa ] (2) 25 57 10 56 (2) 17 45 50 > 
Corr. for index error of needle | 十 8 48 
O , ” 
Deduced inclination ........... 60 07 48, 
| * o , ” 0 D " 
Differences وم‎ Or 00 — "T 2i 84 q1 Uo Ce 
[9] Lë ” o , " 
Half diff, or angles of deflection S£ 00 Sh. | oom 4 jq EE 
O , ” o € ” 
Sum of means H9. 55 20. ee a 120 06 DO  — |. 
o , " le] 7 7 
Half sum — dip -- کہ‎ M 4 39 ^5.  ج‎ 60 02 855 دب مه‎ 
