MAGNETIC OBSERVATIONS. 83 
OBSERV ATIONS— Continued. 
Station, Albuquerque ; latitude 35° 05' 50"; longitude Th. 06m. 31. 47s. 
Needle, A. Date, October 18, 1853. Hour of beginning, 12h. 15m. p. m.; hourof ending, 1h. 30m. p. m. 
Observers, Lieut. A. W. Whipple and Lieut. J. C. Ives, Topographical Engineers. 
[e] , " 
Í 38 51 
Needle vertical, face of circle north, reading of azimuth circle 38 21 
( 38 55 
í 38 55 
Needle vertical, face of circle south, reading of azimuth circle 38 44 
| 38 23 
Reading of azimuth circle when plane of instrument is in the magneti idi 38 41 30 
Reading of azimuth circle when plane of instrument is in the true meridian 51 54 51 
Approximate magnetic declination 13 13 21 
OBSERVATIONS FOR MAGNETIC INCLINATION AND INTENSITY—No. 4. 
Def. with wt. 2 gr. Def. with wt. 2.5 gr. 
Face of circle. Direct. 
Def. towards whe P> Ther. tow: Def. from | Ther. 
the vertical. | the .| Fah. | the vertical. | the vertical. | Fah. 
(1) D (1) (2) 
لی‎ ju. m Dar o Ogg? 6 Q o 
62 20 87 58 36 50 75.5 94 45 29 50 14.5 
East. 62 25 87 55 36 48 74.5 94 58 NS. او ان‎ 
۱ 62 13 87 52 OE a EE 94 53 OR m mU 
| 62 07 87 32 36 28 15 94 45 29 30 75 
West 62 05 87 30 26590. 1. xs 94 40 29 40 ااا‎ 
62 00 87 47 36 25 75 94 23 29 42 75 
| 
O x " 0 , " 0 7 ” 
M )1( 87 45 40 l Í (1) 94 44 00 } 75 
eans 62 11 404 o 36 38 sos | D (2) 29 40 00 
o 2 * 0 d " 
Differences seu LZ DEW L 
[e] , e" o , " 
me aa terae. or angles of ےو‎ 33 E loa BMW L... 
o ۳ e ° , ” 
Sum of means 124 24 30  ]-------- 24 24 00 |------- Ge 
° , ۱ A سے‎ o F " 
Half sum — dip 62 . 13 6 02.194 00 “thee. 
