Narrative of the surveying voyages of his majesty's ships Adventure and Beagle (vol.2- Appendix): between the years 1826 and 1836 : describing their examination of the southern shores of South America, and the Beagles's circumnavigation of the globe

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.