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

*Jf^. APPENDIX. between the years 1826 and 1830 ; and in the whole 62 different results were obtained, the mean of which makes it 13° 4' 27" west of Villegagnon Island, or 56° 9' 30" GoRRiTi (well at the north-east end) is 1 15' 51", by twenty-four chronometrical results, to the eastward of Rat Island, Montevideo, or... 54° 53' 38" Cape St. Mary is 54° 5' 58" Buenos Ayres (Cathedral). — By three chronometers is 2° 8' 24" west of Rat Island, Monte Video, or 58° 17' 53" Port Famine (Observatory at the west side of the bay). — The me- ridional difference between this place and Rat Island at Monte Video was also found on the several occasions of the ships passing to and fi'o. In aU, 54 chronometrical results were obtained, the mean of which makes the Observatory 14° 44' 31" to the west- ward, or 70° 54' 01" Port Desire (Ruins of the Spanish colony).— Fifteen chronometri- cal results make it 9° 42' 15" to the west of Rat Island, Monte Video, or 65° 51' 45'J Sea Bear Bay (Sandy beach on the south side of the bay) — is 7'44" east of Port Desire, and therefore 65° 44' 01" St. Martin Cove, near Cape Horn (the head of the cove). Twelve chronometers made its longitude 11° 19' 33" west of Rat Island, Monte Video, or 67° 29' 03" Valparaiso (Cerro Alegre). — Tliis place was found by seven chro- nometers to be 4° 3' 48" to the westward of St. Martin Cove, or 71° 32' 51" west of Greenwich, but between it and Port Famine the difference being by ten chronometers 0° 41' 8" or 71° 35' 9" west, the mean has been taken, viz 71° 34' 12" Juan Fernandez (Cumberland Bay, the fort). — This place was found by nine chronometers to be 7° 11' 52" west of Valparaiso, which makes it 78° 46' 04" Talcahuano Bay (Fort Galvez). — By eleven chronometers the dif- ference between it and Valparaiso is...l° 28' 53" or 73° 03' 05" San Carlos de Chiloe (Sandy Point). — ^The point which is opposite to the town is, by twenty chronometrical results, 2° 16' 13" west of Valparaiso, or 73° 5^ 25" The above are the principal chronometrical determinations that were made : the following are dependant on them :