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APPENDIX. 
Account of the observations by which the Longitudes of places on the south 
coast of Terra Australis have been settled. 
Th e lunar distances and other observations taken in the Investigator's 
voyage having been ordered by the Commissioners of the Board of 
Longitude to be recalculated by a professed astronomer, with every 
degree of correctness which science has hitherto been able to point 
out as necessary, this delicate, but laborious task was assigned to 
Mr. John Crosley, formerly assistant at the Royal Observatory at 
Greenwich ; a gentleman who formed part of the expedition as far 
as the Cape of Good Hope, but whose ill health had then made it 
necessary to relinquish the voyage and return to England. The 
data and results of all the observations will probably be made public, 
by order of the Commissioners ; but in the mean time, for the satis- 
faction of the geographer, and more especially for that of the sea- 
man, whose life and property may be connected with the accuracy 
of the charts, the results of the lunar distances observed upon each 
coast are added in the form of an Appendix to the volume wherein 
that coast is described. It is by these results that the time keepers 
have been regulated ; and the longitudes used in the construction of 
the charts are taken from the time keepers. 
To appreciate the degree of confidence to which these results 
may be entitled, it is necessary to know under what circumstances 
the observations were taken ; also the method used in the calcula- 
tions, and the corrections which have been applied beyond what is 
usual in the common practice at sea : of these the following is a 
general statement. 
