APPENDIX. 



347 



Beagle's Chain of Meridian Distances and Resulting 

 Longitudes in the Atlantic Ocean. 



1831—1836. 





H. 



M. 



s. 



H. 



M. 



s. 



Plymouth (Government House, Devonport) 









0 



16 



40,3 



Plymouth to Port Praya* 



1 



17 



20,0 



1 



34 



00,3 



Port Praya to Fernando de Noronlia 



0 



35 



39,9 



2 



09 



40,3 



Fernando de Noronha to Bahia 



0 



24 



23,6 









Port Praya to Bahia* 



1 



00 



03,5 



2 



34 



03,B 



Bahia to Rio de Janeiro 



0 



i8 



31,4 



2 



52 



35,2 



Rio de Janeiro to Monte Video 



o 



52 



17,6 



3 



44 



52,B 



Other Determinations. 



Plymouth (or the Government House at Devonport) taken 









from the Ordnance Survey and Dr. Tiarks 



0 



16 



41,4 



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



1 



34 



04,8 



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









meridian distance thence to the same spot in Port Praya 









placed it in 



1 



34 



02,9 



Beagle — Plymouth to Port Praya 





17 



20,7 



Beagle — Port Praya to Plymouth 



1 



17 



19,4 



Beagle — Port Praya to Bahia 



1 



00 



03,0 



Beagle — Bahia to Port Praya 



1 



00 



04,1 



Beagle — Bahia to Rio de Janeiro 



0 



18 



31,6 



Beagle — Rio de Janeiro to Bahia 



0 



18 



31,4 



Beagle — Bahia to Rio de Janeiro 



0 



18 



31,5 



Captain Foster — Rio de Janeiro to Monte Video 



0 



52 



19,0 



Captain King — Rio de Janeiro to Monte Video 



0 



52 



17,8 



M. Barral — Rio de Janeiro to Monte Video 



0 



52 



17,4 



Beagle in 1830— Monte Video to Rio de Janeiro 



0 



52 



18,0 



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 Coimbra, to have been deduced from upwards of three 

 thousand observations. 



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. 



