148 
APPENDIX L.—ASTRONOMICAL OBSERVATIONS. 
ASTRONOMICAL OBSERVATIONS—Continued. 
Observations for variation of the compass, April 26, 1854.— 
Double altitude of Spica Virginis, in the east. 
Determination of latitude, April 28, meg —Double altitudes of 
Polaris, in the wes 
Time. Altitude. Magnetic bearing. | Time. Altitudes. Deduced latitudes. 
ACA € d on è d. m. s. | S d. m. de Th. 4 
7 49 16 71: 93. 00 8.53 30 00 E. 7. 06°33 64 42 40 
7- 09 57 64 40 50 
; | 7 19 T9 64 39 50 
Thermometer 62° Fahrenheit. 7 13 42 64 39. 10 
7. 14.) oe 64 38 30 33.98 07:92 
una 7 —316- 10 64 37 40 
7 18 00 64 36 50 
7T"39- 14 64 36 90 
| 2 90: B8 64 35 50 
CAMP FOUR MILES EAST OF THE WEST FORK OF THE | 7 99 ]8 64 35 10 33 98 04.42 
TRINITY. 
7 96 64 33 40 
y DETERMINATION OF LATITUDE. 4. 98. OF 64 33 00 
7° 20. 43 64 32. 920 
Approximate latitude to be used in first computation of 7 31 05 64 31 40 
time, 33° 10’. 7 32 45 6 00 
7-34 25 64 30 10 -33 98 16.57 
Determination of time, IN 28, 1554.— Double altitudes of 7 37 47 64 28 3 
ocyon, init. 7. 99. 26 64 27 50 : 
7. 4l. 08 604 97 ID 
74 49. 38 64 26 20 
Time. Altitudes: Chronometer slow of 7 4 44 6 33 27 59.01 
: : mean time. 
Thermometer 48° Fahrenheit. 
km è d. 9. ee À m a 
: = = pe 20 ue Determination of latitude, April 98, 1854.— Double altitudes of 
. 53 10 ~ Spica Virginis, in the east. 
6 44 58 | 989-20. 10 fie 
6 45 50 s9 09 20 : 7 à SIR 
TERE Uc -oen Time. Altitudes. | Deduced latitudes. c] 
6 47 2 83 20 ! 
6 48 10 88 10 90 
6 48 58 Hn 53 10 P 
6 49 47 | 87 34 00 21-3 Ji "a dom s 
6 50 30 | &7 18 40 0. 54 8,53 8 00 45 76 94 40 
8401 39 780. 35. 50 
. 8 02 76 50.10 
8-03. 410 "uu Url. 
Double altitudes of Arcturus, in the east. es m PEN oe 
8 04 45 77 24 40 
> . 8 05 31 77 1 
Time. Altitudes. Chronometer slow of 8. 06 17 T4 wd 19 
mean time. 8 07 07 44.859. 40 
8 07 50 78 09 50 321 3L 1H 
h. m. qo 9 78 X WW * 8 78 19 
7 4 95 43 50 8 09 10 78. 30. 00 
7 48 4l 96 10 40 8 09 55 78 
7 49 18 30 8-310 4l 78 50 10 
7 50 19 90. DI 40 8 11 94 79 01 330 
7 51 07 907 1l 30 0.54. 2.23 8 129 19 79 13 00 33 30 OL 
7.51 59 or 3.10 "uds I 79 -96 00 
7 524 bf 97 57 00 87123 58 70 36 
7 54 06 98 25 20 8 14 45 79 48 00 
zo A4 98 53 90 8 15 3 79 59 00 
er o 99-13-50 «54. 5.29 B. 16. MI 80 10 10 33 30 13 
Thermometer 48° Fahrenheit. Thermometer 48° Fahrenheit. 
