APPENDIX. 



34)9 



Beagle's Chain of Meridian Distances and Resulting Longi- 

 tudes in the Pacific Ocean, between Cape Horn and Otaheite. 



1834—1835. 



Port Famine to San Carlos, Chiloe 



H, 



0 



M. 

 1 1 



s. 



53,5* 



H. 



4 



M. 



55 



8. 



45,0 



San Carlos to Valparaiso 



0 



o8 



59,2 



4 



46 



45,8 



Valparaiso to Callao 



0 



22 



09,0 



5 



08 



54,8 



Callao to Chatham Island in the Galapagos 



0 



49 



32,8 



5 



58 



27,6 



Chatham Island to Charles Island 



0 



03 



39,5 



6 



02 



07,1 



Charles Island to Otaheite ... 



3 



56 



12,3 



9 



58 



19,4 



Other Determinations. 



Beagle 1830 — Port Famine to Cape Horn, by true bearing of 



Sarmiento from Doris Peak 



0 



14 



46,5 



Beagle 1829-30 — Cape Horn to San Carlos 



0 



26 



39,9 



Beagle 1829 — Port Famine to San Carlos 



0 



11 



54,0 



Beagle 1829 — San Carlos to Valparaiso 



0 



09 



00,2 



Malaspina and Espinosa had an observatory at San Carlos, 









whose longitude they considered 



4 



55 



47,5 



Their meridian distance f thence to Valparaiso was 



0 



08 



59,8 



Malaspina's and Espinosa's observations, calculated by Profes- 









sor Oltmanns, give for Valparaiso ... 



4 



46 



47.7 



And for Callao Castle 



5 



08 



57.1 



Repeated examination of the successive differences of longitude given in these 

 pages, and the data on which they rest, leads me to think that the alterations 

 spoken of by Captain King, in page 493 of Volume I., were unnecessary. 



By an unexceptionable true-bearing of Mount Sarmiento, from Doris Peak, 

 I was enabled to connect the longitude of the outer coast with that of Port 

 Famine in a most satisfactory manner. 



M. Lartigue, in the French frigate Clorinde (see Connaissance des Tems, 

 for 1836), made the meridian distance between Callao and Valparaiso almost 

 identical with that of Espinosa and Malaspina, as well as the above stated 

 result of the Beagle's measurement. 



* oh. 11m. 59,4s. - 5,9s. =oh. 11m. 53,5s. 



t In Malaspina's expedition there were at least four chronometers, made by 

 Arnold, besides others. 



