141 APPENDIX L —ASTRONOMICAL OBSERVATIONS. 
ASTRONOMICAL OBSERVATIONS —OContinued. 
Determination of latitude April 17, 1554. — Double altitudes of 
CAMP ELEVEN AND FOUR- — I EAST OF Ps 
THE SULPHUR SPRINGS OF OLORADO. ariii 
April 12, 1854. 
». ^5. Time. Altitudes. Deduced latitudes. 
Magnetie amplitude of the Sun's centre at his 
setting 00 00 00 
Variation 9 58 50 As Mx & d, d. m s 
7 14 58 63 25 40 
7 17 04 63 0 
T 18 57 63.33. 20 
CAMP ON DIVIDING RIDGE OF THE COLORADO AND 7 91 43 63 00 
í 15 
BRAZOS RIVERS. 4c 232 02 63 30 40 32 40 39 
April 17, 1854. 7 95 99 63 28 50 
dia , 7 97 46 63 97 40 
Magnetic amplitude of the Sun's centre at his : 2 = -- ie = 
rising N.24 30 00 7 32 32 63 24 50 39 40 23.69 
3.-94-. 19 63- 983: 50 
7 36 00 63 
CAMP ON TRIBUTARY OF THE BRAZOS RIVER. 7-38 01 63 91 40 
7 39 49 63 0 
DETERMINATION OF LATITUDE. T: 41: 15 63 20 00 
7 42 44 63 19 30 32 40 23.91 
Approximate latitude to be used in the first computation of 
time, 32° 45’. 7 44 99 63 18 30 
ms : 7 46 31 63 
Determination of time, April 17, 1854.— Double altitudes of 7 48 10 63 16 20 
Sirius, in the wesi 7 49 58 63.15. 20 
2 1: 51: 43 63 14 10 32 40 24.41 
Time. Altitudes. Chronometer cde 
of mean Thermometer 64° Fahrenheit. 
h. m. s d e E Ew x Determination of latitude, April 17, 1854. a altitudes of 
6 32 05 62 31 00 Spica Virginis, in the ea 
G “So. H 62 
6 34 50 61 47 40 
6 95 48 61 1 : ^ 
6 36 44 61 16 90 0 37 36.75 Time. | Altitudes. Deduced latitudes. 
6 37 46 61 00 20 
6 38 4l 60 45 50 A. m s d, gd. m, 4 
6 39 50 60 97 10 8,395.95 | TU, 45. 10 
6 40 52 60 10 10 | E S S d. 5 px 
6 l 5l 59 52 40 0 j | * 
4 | | s» | 8 29 71 39 40 
| 8 39 26 71. 56. 10 323. 49; Si 
i | 8 41 18 79 99 40 
8 42 09 7834 
Time. Altitudes. Chronometer slow | 8 43 02 79 57 40 
of meantime. | 8 43 57 73 13 10 
| | 8-44 55 73 99 40 $2: 42: 59:3 
h. m. | d. mi i É& mio 8 45 50 79. 44 90 
7 54 05 | 73 34 26 8 46 44 73:59. 50 
7 56 04 i 73 55 10 8 47 34 74 13-99 
T 56 07 | 74 22 40 8 48 34 74- 33 10 
735607 05 74 46 09 82 49 97 14> 45-39 
7 58 90 18 50 0. 3927: 90.98 5 50 15 Ja 50 10 32 42 40 
T 89 17 75b 49 0 8 51 10 75-19 40 
8 0 15 76 07 90 8 5% 01 75 
8 Of It 76° 32 8 62-59 75 42 19 
8 02 1l 76 56 40 B D3 5l 75 56 00 
8 03 21 77 94 50 Ok dem 8 54 44 76 10 00 32 49 55 
| 
Thermometer 649 Fahrenheit. i Thermometer 61^ Fahrenheit. 
d ARR 
