[174] 612 
ENCAMPMENT AT FORT ARAM 4,470 FEET ABOVE THE LEVEL OF THE - 
GULF. OP MEXICO. 
Determination of longitude, July 21, 1842—altitude of the sun. 
OBSERVATIONS. 
Z ay a en iz 
SECOND SERIES. 
‘FIRST SERIES. 
a i i : 
Double altitude of the | Time of chronometer. | Double altitude of’ the Time of chronometer. 
‘Tower limb of the sun. ? | lower limb ot the sun 
5 : -—-_-_ : =~ 
Deg, min. sec. | hz Deg. min. ° sec. _ hh. min. see. 
3: -oF 4 ys 4t 24 506 $ 57.0 
~hO—-23--- 59-3 8 41 42 10 8 56 44.0 
40 36 20 8 41 64 20 8 6T “Y64 
40 54 10 8 42° 07 30 8-57 62,3 
41. 05 00 8 42 22 40 8 58 34.3 
Thermometer 66° 
Index error = ++ 25 sec. 
€ RESULT OF CALCULATION, 
he min. ~ see h. min. sec: 
6 46 O* = ~ 09 25 
= the chronometric iin the lunar distance bern at Dritd- 
Meat tamp i is this place. 
