352 APPENDIX. 



Having vhus endeavoured to give a view of the Beagle's principal 

 measurements of meridian distances, vi'ith some of the collateral de- 

 terminations which are at present within my reach, I •wUHngly refrain 

 from their discussion. 



It is for those who have access to more extended information, and 

 who are not personally interested in the question, by having assisted 

 in malving any of these measures themselves, to discuss and assign 

 values to them. 



For this reason, an intention which I entertained of attempting to 

 make some enquiry into the grounds on which the longitudes of 

 Jamaica, the Havannah, Chagres, Panama, &c. are by some persons 

 considered to be well determined, has been relinquished. 



I will conclude by remarking, that if so small a vessel as the 

 Beagle, with so few chronometers going well, latterly, could attain, 

 during a tedious and indirect voyage of five years, to within thirty- 

 three seconds of the truth — a much nearer approach to exactness 

 may be anticipated from measurements made in far less time, with a 

 greater number of chronometers. 



END OF THE APPENDIX. 



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