Quack-medicine vendors are not wanting in Buenos Ayres to render important services to humanity. Two magnificent cut-glass decanters, gigantic in proportion to a tree of wondrous virtues which stands between them, are stated to be full of a healing medicine, which will do the business of all whom the faculty have given up or are otherwise incurable, as effectually as Parr's Life Pills or Holloway's Ointment. The chief establishment for the sale of this elixir is very carefully pointed out; and for the benefit of future travellers we may mention, that it is to be found at No. 496 in the street of Cangallo, and in the very last door on the left-hand side, behind the windmill; and that in the court-yard of the house there is a garden filled with statues, of which the originals are probably defunct; but whether the elixir out of the two large decanters had any thing to do with this apotheosis, we refrain from conjecturing. The preceding advertisements are the most noticeable for embellishment and style. The ordinary kind of wants are set forth with woodcuts and text of a less striking kind, but almost all are illustrated. Wine has a barrel for its sign; music, a violin; travelling, a carriage; gardening, a flower-pot; upholstery, a chair; the cobbler's mystery, a top-boot; the hatter's, a beaver; and the letter of lodgings, a house full of windows. Not all of them are confined to the Spanish language, for there are many English merchants and traders; and to accommodate the last, a notice like the following recommends the aforementioned Street of Piety: "To Det. To roms in altos one Squaz from the Place of Victory." The author of this announcement certainly had not achieved a victory over the English language. From the London Examiner. GUIZOT AND MONTALEMBERT. The greatest novelty now in Paris is a speech. Any specimen of oratory that the police will first allow to be spoken, and then to be printed, is quite an attraction. Indeed there is but one remaining chance of perpetrating a speech, and that is by achieving your election as a member of the Institute, or being appointed as an old member to welcome the newly-elected academician. These are the only legitimate opportunities for making one's voice heard in public that M. Bonaparte's code has left to the Frenchman.