154 APPENDIX L.—ASTRONOMICAL OBSERVATIONS. 
ASTRONOMICAL OBSERVATIONS—Continued. . 
Double altitude of Spica Virginis, in the east. Determination of n by lunar prctio Moon’s west- 
n limb and Pollux, west. 
ime. Altitude. Magnetic bearing. | 
Ww - | bé ~ Time. Angular distances. | | Deduced longitude. 
Ao" oe. d. Who | d m. a 
7- SF 03 74 59 30 S. 49 00 00E. h. m. s. m. 8. 
| 7 00 3l 98 06 15 
7 09 I9 98 07 35 
Aa O 10 19" o 7 05- 98 (8 35 
Variation of compass, E. 10° 19' 12". Thermometer 66° Fah. 7 070 98 09 95 6 99 07 
Double altitude of the Moon's upper limb, in the east. 
ON ELM FORK OF TRINITY RIVER. iima Altitude. 
DETERMINATION OF LONGITUDE BY LUNAR DISTANCES. 
k S" s. d. m. 8. 
Approximate latitude to be used in first computation of time, 7? 98 )49 69 20 55 
33° 45. 
Determination of time, May 10, 1854.— Double altitudes of Pol- 
uz, in the west. Double altitude of Pollux, in the west. 
Time. Altitudes. ‘Chronometer slow of Time. Altitude. 
“mean time. 
h m. s. m. s 
Ao m. è dons. Ao ts. 7 il 30 81 03 15 
6 38 24 4 44 25 A 3 154 
6€ 39.33 94 -J7 -05 1-343 
6 40. 99 93 56 55 t 3.19.4 
6 41 18 93 34 15 3 16.5 
6 42 13 93 10 05 E. H5 Time Angular distances. | Deduced longitude. 
` 6 43 05 92 48 25 [I4 B5 ; 
6 43 DT 92 27 45 3 12.0 
6 44 55 99 03 05 I uw RIS h. m. d. m. A. n t 
6 45 40 91 44 15 il 3 50 To $3 P 98 11 45 
6 46 33 91 22 7 15 00 98 12 5 r 
7 16 55 98 14 05 
7 18 59 98 15 05 6 29 08 
Doub it i y 
viia andes qf desinit ia Giang Double altitude of Pollux, in the west. 
Time. Altitudes. Chronometer slow of Time. Altitude. 
mean time. 4 
À. m. ro d m 8. j | 
À. m. s. d. rs Be the X : a E 
6 48 93 94 32 45 1 58 H3 E UN sb inc, cias 5 
6 49 99 94 57 05 i $ Ixe Le 
6 50 27 95 55 1 8-164 a 
6 51 13 95 05 1.9 HW à E 
6 51 57 96 01 05 Te M Double altitude of the Moon’s upper limb, in the east. [ 
6 59 53 96 94 35 1 3 M.6 GR LARUM E ! 
6 53 47 96 47 35 1:594 16:4 : i 
6 54 34 97 05 1 3.144 Time. Altitude. n 
655 Hn UT 94 95 ] $9 H6 ee 
6 56 13 97 47 05 1 3.1.6 4 
h m 8. d. m i E 
T EI 8 7d H 
Thermometer 56° Fahrenheit. 
