146 
APPENDIX L.— ASTRONOMICAL OBSERVATIONS. 
ASTRONOMICAL OBSERVATIONS—Continued. 
Observations for the variation of the compass, April 20, 1854.— 
Double altitudes of Polaris , in the west. 
Time. 
Altitude. 
Magnetic bearing. 
h. ?i 
d. n 
i s 
d. m. s. 
7 36 30 
63 40 10 
N. 11 50 00 W. 
Variation of compass, E. 10° 30'. 
Double altitude of Spica Virginis 
;, in the east. 
Time, 
a. m. 
Altitude. 
Magnetic bearing. 
h. 
n. s. 
d. n 
l. s. 
d. m. s. 
8 38 47 
76 06 20 
S. 49 20 40 E. 
Variation of compass, E. 10° 
30' 50". 
Thermometer 69° Fahrenheit. 
AT CLEAR FORK OF THE BRAZOS—CROSSING OF THE 
ROAD. 
DETERMINATION OF LATITUDE. 
Approximate latitude to be used in first computation of time, 
32° 55'. 
Determination of time , April 24, 1854 — 
-Double altitudes of 
Procyon , 
in the west. 
Time. 
Altitudes. 
h. 
111. S. 
d. 
m. s. 
7 
14 
31 
86 
43 20 ) error• 
7 
15 
34 
86 
18 20 5 rej’d! 
7 
17 
37 
85 
32 30 
7 
18 
37 
85 
10 50 
7 
19 ! 
27 
84 
51 40 
7 
20 
07 
84 
36 10 
7 
20 
51 
84 
19 00 
7 
21 
39 
84 
01 40 
7 
22 
25 
83 
43 20 
7 
23 
16 
83 
24 50 
Double altitudes of Arcturus, h 
2 the east. 
Time. 
Altitudes. 
h. 
m. 
s. 
d. 
m. s. 
8 
13 : 
29 
97 
49 00 
8 
14 
49 
98 
22 10 
8 
15 
32 
98 
40 10 
8 
16 
19 
99 
00 00 
8 
17 
07 
99 
20 10 
8 
17 
55 
99 
39 00 
8 
18 
44 
99 
59 40 
8 
19 
34 
100 
20 40 
8 
20 
13 
100 
39 40 
8 
21 
01 
100 
57 20 
Thermometer 55° Fahrenheit. 
Deduced latitudes. 
26 4!) 
28 30 
30 28 
32 45 
34 56 
36 55 
39 05 
41 30 
7 51 05 
7 53 51 
7 56 02 
7 58 10 
8 00 17 
8 04 50 
8 07 19 
8 09 55 
8 11 31 
d. m. s. 
63 45 40 
63 44 50 
63 43 50 
63 43 10 
63 42 00 
63 41 00 
63 40 00 
63 38 50 
63 38 00 
63 36 40 
63 35 30 
63 34 40 
53 33 40 
63 32 50 
63 32 00 
63 31 10 
63 30 10 
63 29 10 
63 28 20 
63 27 20 
63 26 30 
Thermometer 55° Fahrenheit. 
Determination of latitude, April 24, 1854 .—Double altitudes of 
Spica Virginis, in the east. 
8 49 53 
8 50 45 
8 51 28 
8 52 07 
8 53 08 
8 53 54 
8 54 42 
8 55 22 
8 56 08 
8 56 48 
8 57 27 
8 58 07 
8 58 48 
8 59 36 
9 00 15 
9 00 58 
9 01 36 
9 02 17 
9 03 03 
9 03 44 
9 04 23 
9 05 08 
d. m. s. 
83 39 50 
83 50 20 
84 00 10 
84 08 10 
84 20 00 
84 29 10 
84 39 00 
84 46 50 
84 56 20 
85 03 20 
85 1L 10 
85 18 40 
85 27 00 
85 35 30 
85 43 40 
85 51 40 
85 58 00 
86 06 00 
86 14 20 
86 21 20 
86 28 10 
86 36 00 
Deduced latitudes. 
Thermometer 55° Fahrenheit. 
