The excellence of the following Treatise is so well known to all in any tolerable degree conversant with the Art of Painting, that it would be almost superfluous to say any thing respecting it, were it not that it here appears under the form of a new translation, of which fome account may be expected. Of the original Work, which is in reality a selection from the voluminous manuscript collections of the Author, both in Solio and Quarto, of all such passages as related to Painting, no edition appeared in print till 1651. Though its Author died so long before as the year 1519; and it is owing to the circumstance of a manuscript copy of these extracts in the original Italian, having fallen into the hands of "Raphael" that in the former of these years it was published at Paris in a thin folio volume in that language, accompanied with a set of cuts from the drawings of Niccolo Pouissin, and Alberti, the former having designed and defined the human figures, the latter the geometrical and other representations..