668 
APPENDIX. 
San Francisco, the difference agrees with the difference of longitude 31' 21 " measured back- 
ward and forward by chronometer. It will be proper, therefore, to consider the 
0 f n t 1/ 0 I '> 
Longitude of Monterey Observatory, 123 23 07 — 31 21 =121 51 4i6 
which is within l' 06" of the corresponding observation. 
Monterey Fort Latitude, 36° 36' 2-1" N. Longitude, 121° 51' 46" W. 
COftUIMBO. 
Observatory 10" N. of the Copper Foundery. 
1828. 
May 28. 
29. 
31. 
LONGITUDE. 
Moon’s transit ° ' " 
compared with S Ophiuchi, 71 15 30 W. 
. . . a Scorpionis, 16 52 
. . . a " Capricorni, I r- • i, 
5 16 52 * Greenwich. 
L.4T1TUDE. 
o ! 7 
Mean 9 meridian al-1 . c 
titudes © and * / 
Difference, . +10 
Mean, . 71 16 41 W. 
29 56 57 S. 
Copper Foundery Latitude, 29° 56' 57" S. Longitude, 7 1® 16' 41" W. 
CHAMISSO ISLAND. 
The longitude of this island was determined by lunar observations. 
0 t If 
1826. 0 and* B. and W 161 45 45 W. 
1827. 46 sets E. and W. 45 56 
Mean, . . 161 45 50.5 W. 
1826. Lieutenant Wain wright, 28 sets, © E. 161 44 03 
1827. Ditto ditto 20 sets, E. and W 42 24 
Latitude by mean of many meridian altitudes, ©, with artificial horizon, 66 13 11 N. 
do. do. Lieutenant Belcher, 66 13 12 
do. do. Lieutenant Wainwright, 66 13 10 
Latitude of the summit of Chamisso Island, 66» 13' 11" N. Longitude, 161° 45' 50" W. 
The chronometrical measurements between San Francisco and Chamisso agree very 
nearly with this determination of the longitude by lunar. 
In 1826 the diffeience was . . . .39 23 33 
1827, 39 26 12 
Mean, . . 39 24 57 
Longitude, San Francisco, . 122 23 07 
Longitude, Chamisso Island, 161 48 04 W. 
Bylunars, . 161 45 50 W. 
