[ize] GLU 
ENCAMPMENT AT F ORT aa 4,470 FEET ALOVE THE LEVEL OF THE 
GULF OF M MEXICO 
“pedieabietin of longitude, July 16, 1842—allilucle of the sun. 
OBSERVATIONS. 
i FIRST SERIES, e | SECOND SERIES. 
Double altitude of the | Time of chronometer. Double pltiuae of the | Time of chronometer. _ 
sun’s lower limb. sun’s lower limb. K 
Deg. min. sec. he. min. see: Deg. min. sec. | he min. _ sec. 
58, 31 .. 20 9. 40. 21.0 6. 12 B® 9... 44. 52.5 
58 40 9. @h- 33.6 60 37 50 9 46. O10 
59 18 30 9 42 29.0 60 49 50 9 46 34.0 
59 28 10 9 42 54.0 20 9 §9.90--— 
59 45 00 9. 43 40 4 61 It 00 9 47 $2.5 
“ Thermometer 81°. 3. 
Index error = + 25 sec. 
RESULT OF CALCULATION. 
Mean time. Advance. Longitude. 
he min. — see. he min. see. Deg. min. sec. 
4° “36 17 2 10 35 1 20. 13 
_ Determination of longitude, July 18, 1842—ualtitude of o Aquilz. 
OBSERVATIONS. 
FIRST SERIES. 
SECOND SERIES. 
a 
Double alti of a | Time of chronometer. || Double altitude of a | Time of chronometer. 
Aquile ie : / Aquila. re Seay 
Deg. mn. sec. eens Deg. min ae 
79 3l 10 il 17 4.5 80 55 40 i 21 29 
2.87 Il 18° 25.5. OUTS SS go | 23 @ 
80 32 * 20 toy «(18.6 oe vi ee ee 
RESULT OF CALCULATION. | —_— 
