Commerce of He Blaes Sea.-It is sta ted in the National Gazette, that according to letters from smyrna, da- ted 24th March, the Ottoman Porte refuses to enter into commercial ar- engagements with the United States. and American vessels will be still ex- cinded from the Black Sea.

 The Ottoman Porte may refuse to enter into commercial arrangements with the United States, but is question: able whether it follows that American commerce can be excluded from the Black Sea by such refusal. The terms of the treaty of .Adrianople are liable enough to admit our ships, proyi- ded we are at peace with the Porte. This point however is connected some what with our relations with Russia. and will probably become a matter oi consideration on the part of our new Minister.-.N. '. Cour. & En9.