APPENDIX. 



Santos (the Arsenal). — By twelve chronometers this place is 

 3° ir 31" west of Rio de Janeiro, or 46° 16' 33" 



St. Catherine (Flag Staff of S*\Cruz D'Anhatomirim) is, by 

 fifteen chronometrical results, 5° 24' 38" to the west of Rio de 

 Janeiro, or 48° 29' 41" 



Port Sta. Elena (the spot marked " Ohservatory" on the plan). — 

 Eleven chronometers made it 10° 23' 46" west of the Island of 

 Gorriti, or 65° 17' 25" 



Cape Virgins (extremit}^ of the cliff). — ^By ten chronometers is 

 13° 24' 8" to the west of Gorriti, or 68° 17' 46" west of Green- 

 wich; but by comparing it with Port Famine, from which ten chro- 

 nometers make it 2° 36' 0" to the eastward, the result is 68° 18' 01"; 

 the mean of the two determinations makes it 68° 17' 53" 



Port Gallant (Wigwam Point). — By twenty-one chronometers 

 is 1° 2' 55" west of Port Famine, or 71'' 56' 57" 



Harbour of Mercy (Observation Islet) at the western end of the 

 Strait of Magalhaens is 3° 40' 55" west of Port Famine, or 

 74° 34' 56" west of Greenwich. By the survey, however, it is 

 laid down in 74*^ 35' 31" 



During the voyage various astronomical observations were made 

 for the longitude, the summary of which is as follows : 



Period. 



Sept, 1826 



Oct. 1828 



Nov. 1829 



Jan. 1830 



Place. 



Rio de Janeiro 



Gorriti* 



Chiloe 



Valparaiso.. . . 



Between 

 the 

 ([ 

 and 



No. of Series. 



On each 

 side. 



In all. 



Longitude 



by , 

 Observation. 



o / // 

 16 43 8 18 



18 54 53 40 

 16 I 73 48 42 

 32 71 35 10 



Longitude 

 Chronometer. 



o / // 

 43 5 3 



54 53 38 

 73 50 25 

 71 34 12 



* The longitude of Gorriti by Captain Stokes's lunars was 54° 57' W ; 

 that of Monte Video (Rat Island) 56" 14'; of Port Famine old observa- 

 tory (at the west side of the bay) 70° 57'; and of Villegagnoii Island, at 

 Rio de Janeiro, 43° 9' W. (each to the nearest minute only). 



Captain Stokes was an excellent observer, and used one of Troughton's 

 best repeating reflecting circles. His lunar observations, which were 



very 



