AUGUST 31, 1847.

  The "Greek Slave" of POWERS, of which I gave you some account a few days since, is meeting a cordial and warm reception in this community. It is visited by four or five hundred people a day, and the numbers are increasing, of both sexes, old and young. It is an era in the history of the arts in this country. A question has been raised as to the moral effect of such an exhibition, unaccustomed as our people are to undressed statuary; but, whatever may be said of the general question in the abstract, there seems to be but one voice here, with regard to this masterpiece of art, among the press or the people. Mr. Kellogg will have the satisfaction, by the next packet or steamer, of making a remittance to his friend Powers, the early proceeds of the exhibition, to lighten his labors and throw a gleam of sunshine across his path.