Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 2, Pt. 4

APPENDIX Lo- ASTRONOMICAL OBSERVATIONS.
ASTRONOMICAL OBSERVATIONS-Continued.
ifetermination of latitude, April 24, 1854.-Double altitudes of
Polaris, its the west.
Observations for the valgicttion of the c no thepass e April 20, 1854. -Do~uble altitu~de,3 of Polalris, in the west.
Titne. Altitude. Magnetic bearing.
h. m. s. d. m. s. d. m. s.
7 36 30 63 40 10 N. 11 50 00W.
d.
63
63
63
63
63
63
63
63
63
63
63
63
53
63
63
63
63
63
63
63
63
Variation of compass, E. 100 30'.
Double altitude of Spica Viryinis, in the east.
32 59 18. 5
Time, a. m. Altitude. Magnetic bearing.
h. m. s. 7. n. s. d.m. s.
8 38 47 76 06 20 S. 49 20 40 E.
Variation of compass, E. 10~ 3(1 5()0".
Thermometer 69~ Fahrenheit.
AT CLEAR FORK OF TI-IE BRAZOS-CROSSING OF TIIE
ROAD.
DETERMINATION OF LATITUDE.
Approximate latitude to be used in first computation of time,
32 59 23.08
320 551.
Determination of time, April 24, 1854.-Double altitudes of
Procyon, in the west.
Determination of latitude, April 24, 1854.-Double altitudes of
Spica Virginis, in the east.
Time. Altitudes.
h. m. s. d. m. s.
7 14 31 86 43 20 error;
7 15 34 86 18 20 rej'd.
7 17 37 85 32 3(0
7 18 37 85 10 50
7 19 27 84 51 40
7 20 07 84 36 10
7 20 5 1 84 19 00)
7 21 39 84 (1 40
7 22 25 83 43 20
7 23 16 83 24 50
Double altitudes of Areturus, in the east.
Altitudes. Deduced latitudes.
d. m. s. d. m. s.
83 39 50
83 50 20
84 00 10
84 08 10
84 20 00 33 01 01
84 29 10
84 39 00
84 46 50
84 56 20
85 03 20
85 1i 10 33 00 47
85 18 40
85 27 00
85 35 30
85 43 40
85 51 40
85 58 00 33 00 45
86 06 00
86 14 20
86 21 20
86 28 10
86 36 00 33 00 44
Time. Altitudes.
h. m. s. d. m. s.
8 13 29 97 49 O0
8 14 49 98 22 10
8 15 32 98 40 10
8 16 1] 9 99 0( 00
8 17 07 99 20 10
8 17 55 99 39 00
8 18 44 99 59 40
8 19 34 1()0 20 40
8 20 13 100 39 40
8 21 O1 100 57 20
Thermometer 550 Fahrenheit.
146
Time.
Altitudes.' Deduced latitudes.
h.
7
7
7
7
7
7
7
.7
7
7
7
7
7
7
7
8
8
8
8
8
8
d. m. s.
M.
26
28
30
32
34
36
39
41
43
46
48
.51
53
56
58
00
02
04
07
09
11
S.
40
30
28
45
56
55
05
30
11
16
58
05
51
02
10
17
30
50
19
5531
M.
45
44
43
43
42
41
40
38
38
36
35
34
33
32
32
31
30
29
28
27
26
S.
40
50
50
10
00
00
00
50
00
40
30
40
40
50
00
10
10
10
20
20
30
32 59 27.6
32 59 28.08
Thermometer 550 Fahreiaheit.
Time.
h. M.-.3.
849 53
850 45
85t 28
852 07
853 08
853 64
854 42
855 22
856 08
856 48
857 27
858 07
858 48
859 36
900 15
900 58
901 36
902 17
903 03
903 44
904 23
905 08
Thermometer 550 Fahrenheit.