‘i. 2 558 - 
ENCAMPMENT? AT “BLACK JACK,” ON THE SANTA FE ROAD. 
Determination of longitude, July 28, 1844—altitudes. of rcturus. 
OBSERVATIONS. 
i| : 
FIRST SERIES. SECOND SERIES. 
Double altitudes of | Time of chronometer. |. Double altitudes of | Time of chronometer. — 
Arcturus. Areturus.- Teatt 
2. t 
Deg. min. sec. — he min. sec. | - min, see. h. min, sec. 
76. > 8 7 46-936. | 7 856 30 3°51 52.0 
75 32 40 AT 41.0 | 7a -38-- 57.5: 
75.09 30 - 48 40.5 | 73 03 «410 5407.0 
age 48 = $0. 49 33.0 :: oe. 55 21.0 
4 23° <- 38 * 40.0 72. 03 . 20 66. 39.7 
. = 
eo _ RESULT OF CALCULATION. : 
= Mean time. Retard. | Longitude. 
hs min, sec. h. min, see. | 
9 33 02 | 5 41° 37.6 
z 
Determination of longitude, Fuly 28, bearalsituden deat aeiter- 
s OBSERVATIONS... ges Yeve 
: _ i. Si Z = 
<< Double altitudes of Filfiier. P Time of Sacmeur. 
5 wuses ir ee ‘as 
Deg. min, sec. h. min, see - 
pees a ae 6 50 20.5 
61 59 40 51 13.0 
=. 62. «17.0 
62 40 40 53 12.0 
r 15 09.6 ~ 
© | RESULT OF CALCULATION. _ 
Mean time. Retard. Longitude, 
