APPENDIX L.— ASTRONOMICAL OBSERVATIONS. 149 
ASTRONOMICAL OBSERVATIONS—Continued. 
T 
Oinematont for the variation of the compass, es 28, 1854.— Determination of longitude by lunar distances, May 6, 
Th 
Double altitude of Polaris, in the w | e Moon’s western limb and nearest limb of the Sun, u 
| 
Time. Altitude. Magnetic bearing. | Time, p. m. Angular distances. | Deduced longitude, 
: | (in are.) 
h.m. & d. m. s. i uo cw 
7 22 18 64 35 10 .1 90 00 W. À. w*»& dw d, who A JA X 
2 33 08 107 37 25 
2 34 50 107 98 15 
Variation of compass, E. 10° 19 40”. 2 36 04 107 29 05 6.34 43 
ost. Clouds 
f AR Leste 
Dévbli aliitade of Spike Viginis, in ibi ead. Double altitude of the Moon's bright (upper) limb, in the east. 
f " : 
Time. Altitude. Magnetie bearing. TN — 
À m cs d. m 
À. m. & d. m. ik H m 
8 00 45 76 94 40 S. 47 30 00E. : T * = = -" 
Variation of compass, E. 10° 13' 02", Thermometer 48° Double altitude of the Sun's upper limb, in the west. 
Fahrenheit. 
Norr.—Continuous rain from the night of the 29th of April Ti : 
to the morning of the 6th of May, 18 aA Ap 
h m d. m. 8 
2 4 2 T3 1a S 
ATERS OF THE TRINITY. 
— A "ua isi " Time, p. m Angular distances. | Deduced longitude. 
DETERMINATION OF LONGITUDE BY LUNAR DISTANCES, 
- : A. m. m. 8 EUM s 
Approximate latitude to be used in first computation of time, 2 48 07 33 55 
339 31^ 35^. 2 50 10 107 34 25 
2 5 4l 107 34 55 
Determination of time, am 6, me —Double altitudes of the 2 53 04 107 35 % 6 35 17 
!— 
Time, p. m. Altitudes. (Chronometer slow of Double altitude of the Sun's upper limb, in the west. 
mean time 
Time. Altitude. 
À. m. d. e AÉ C9 
2-1 37 85 44 55 i d : R : 
9 19 52 84 44 55 ` . : e : : » 
9 99 94 83 49 55 2 54 39 70 19 25 
2 93 15 83 201 45 
2 93 42 > E A 
2.24.17 Double altitude of the Moon’s bright (upper) limb, in the east, 
9 94 47 82 43 15 ed Wien i 
iim ii va 
2 25 32 ox : Altitud 
2 26 30 8» 00 25 "x gi 
9 97 08 81 45 95 ger tees 
27 | Sm 3 | 0 56 Lv e P 
) v u 74 46 15 
Thermometer 78° Fahrenheit. 
