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Appendix.] 



HYDROOI APHY. 





many groups of islands with w^ ,ii onr merchant-%.^^cls have occa>^ 





traffic, or m which the whaline 



•^s refit, and -^hidi ought, th 



ft-r' 



? 



to be more efficiently examined, 



^' On the opposite side of tlie Pacific some pr--res3 has been mao. m 

 surveying the coast between the T ^ oi ' "ritory and the Strait of J wc 



del Fuca; but with the long * 



_ ^ _ 





,H;tw^;en the Oregon district 



W*- 



the entrance of the Gulf of Cai^ ^. .a .vi. arc very superficially acqviah.a=^. 

 and but little is known of the iu - " >r of xhat extensive Gulf. In the 

 present state of those countries it 

 survey into their inner v^ 



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u 



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3 not appear necessary to pusn our 

 rs : but there u .-i be no doubt tbat the coasts 



of Mexico, Guatemala, and New Grauada, sfhich contain many valuable 

 harbours and innumerable trading ports, ought to be minutely and con- 

 nectedly surveyed. 



« From the Equator to Cape Horn, and from thence round to the river 

 Plata, on the eastern side of America, all that is immediately ^^anted has 

 been alreadv achieved by the splendid survey of Captain Fitzroy. 



" Some parts of the great empire of Brazil we owe to the labours oi 

 Baron de Eoussin and of other Frencli officers ; but there is much yet to 

 be done on that coast between the Plata and the Amazon rivers, and 

 again along Guyana and Venezuela up to the mouth of the Orinoco. 



« The shores of the main land between Trinidad island and the Gulf of 

 Mexico have been charted and published by the Admiralty ; but many 

 of the West India islands are still wanting to complete a wholesome 



knowledge of those seas. 



" The United States are carrying on an elaborate survey of their own 

 coasts : and to the northward of them a part of the Bay of Fundy has 

 been done by ourselves, as well as all the shores of Nova Scotia, Canada, 

 and Newfoundlaiid : and when these surveys are finished, we shall only 

 want to complete the eastern coast of AraeL-ica, those of Labrador and of 

 Hudson Bay, which, being in our possession, ought to appear in our 



charts with some degree of truth." 



As it is impossible here to open the question of the positions of the 

 multitude of islands, of the Pacific especially, the apparent number of 

 which has been so greatly increased by the errors of observation o. 

 navigators who liave reported them, we can only recomiuend to the 

 observer the propriety of fixing astronomically every island whicii he 

 may fall in with, and to note any peculiarity by which it may oe 

 identified hereafter. 





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