discovery of a vehicle by Van Eyck, or by any other person, satisfied that there was a discovery by some one at some time, of a vehicle different from the first painting with oil, and from any of modern use. To dispute this fact, appears to us as absurd as if any one should deny the discovery of America, because there may be disputes as to dates and persons of the first discoverers. We are only surprised that Tambroni and others do not take any notice of the chemical differences in the substances of old and new paint--we mean subsequent to the supposed discovery; and we confess we are surprised at the unworthy, unsatisfactory, and ambiguous manner in which Tambroni settles the matter. "Now, being willing to act with generosity towards this noble writer, and to believe that his religion was not overcome by deception, we should perhaps be able to admit that we were indebted to John of Bruges for the practice of tempering colours with both nut and linseed oils, and to Antonello for having used and made common, through all Italy, a method which, in beauty, greatly exceeds distemper-painting, which, until his time, had always been preferred." Does he really mean, or believe, that this new method consisted only in the use of linseed and nut oils? Is he acquainted with the works of John of Bruges, or with that picture of Andrea del Castagno, the supposed murderer of Domenico, which is called by Guarienti "the wonder of painting;" and which, by the description of its finish, _particularly of the room in which the action is represented_, is supposed to have been an imitation of the style of the Flemish master? If it be asked, how could any good practice in any art be lost? we have only to answer that we are not bound to _account_ for a notorious fact with regard to arts in general. Many have been totally lost; but the troubles, the plague, and dispersion of artists in Italy, and the charm of novelty, may be sufficient to account for these changes. Lanzi every where laments them, and tells us that Nicolo Franchini became famous for detaching pieces of paint from old pictures of inferior value, to match deficiencies in more valuable.