APPENDIX. 



347 



Beagle's Chain of Meridian Distances and Resulting 

 Longitudes in the Atlantic Ocean. 



1831—1836. 



Plymoutli (Government House, Devonpoit) 



Plymouth to Port Praya* 



Port Praya to Fernando de Noronha 



Feniando de Noronha to Bahia 



Port Praya to Bahia* 



Bahia to Rio de Janeiro 



Rio de Janeiro to Monte Video 





— 









16 



40,3 



1 



17 



•20,0 



I 



34 



00,3 







35 



39.9 



2 



09 



40,2 







24 



23,6 





— 





I 



00 



03,5 



■2 



34 



03,« 







18 



31,4 



3 



52 



35,2 







52 



17,6 



3 



44 



52,8 



Other Determinations. 



Plymouth (or the Government House at Devonport) taken 



from the Ordnance Survey and Dr. Tiarks 

 Captain W. F. W. Owen placed Port Praya in 

 Dr. Tiarks's longitude of Madeira and Capt. P. 



meridian distance thence to the same spot in 



placed it in 



Beagle— Plymouth to Port Praya 



Beagle — Port Praya to Plymouth 



Beagle — Port Praya to Bahia ... 



Beagle — Bahia to Port Praya 



Beagle — Bahia to Rio de Janeiro 



Beagle — Rio de Janeiro to Bahia 



Beagle — Bahia to Rio de Janeiro 



Captain Foster — Rio de Janeiro to Monte Video 

 Captain King — Rio de Janeiro to Monte Video 

 M. Barral — Rio de Janeiro to Monte Video ... 

 Beagle in 1830— Monte Video to Rio de Janeiro 



The longitude of Rio de Janeiro given in this table is very near the latest 

 determinations of the French, and almost identical with that which is stated , 

 in the Ephemerides of Coirabra, to have been deduced from upwards of three 

 thousand observations. 



... 



... 







16 



41,4 



... 



... 



1 



34 



04,8 



p. King's 

 Port Praya 





34 



02,9 



.. 







17 



20,7 



... 







17 



19,4 



... 







00 



03,0 



... 







00 



04,1 



... 









18 



3',6 



... 









18 



3',4 



... 









18 



3',5 



... 









52 



19,0 



.., 









52 



17,8 



.. 









52 



17,4 



..• 









52 



18,0 



Note. — When more than one measurement is stated between the same two 

 places, it is to be understood that the observations were taken at, or have been 

 reduced to the same points. 



Using the mean of the measurements, outward and homeward. 



