For, in whatever direction the building is contracted, in that direction the eye will be drawn to its terminal lines; and the sense of surface will only be at its fullest when those lines are removed, in every direction, as far as possible. Thus the square and circle are pre-eminently the areas of power among those bounded by purely straight or curved lines; and these, with their relative solids, the cube and sphere, and relative solids of progression (as in the investigation of the laws of proportion I shall call those masses which are generated by the progression of an area of given form along a line in a given direction), the square and cylindrical column, are the elements of utmost power in all architectural arrangements. On the other hand, grace and perfect proportion require an elongation in some one direction: and a sense of power may be communicated to this form of magnitude by a continuous series of any marked features, such as the eye may be unable to number; while yet we feel, from their boldness, decision, and simplicity, that it is indeed their multitude which has embarrassed us, not any confusion or indistinctness of form. This expedient of continued series forms the sublimity of arcades and aisles, of all ranges of columns, and, on a smaller scale, of those Greek mouldings, of which, repeated as they now are in all the meanest and most familiar forms of our furniture, it is impossible altogether to weary. Now, it is evident that the architect has choice of two types of form, each properly associated with its own kind of interest or decoration: the square, or greatest area, to be chosen especially when the _surface_ is to be the subject of thought; and the elongated area, when the _divisions_ of the surface are to be the subjects of thought. Both these orders of form, as I think nearly every other source of power and beauty, are marvellously united in that building which I fear to weary the reader by bringing forward too frequently, as a model of all perfection--the Doge's palace at Venice: its general arrangement, a hollow square; its principal façade, an oblong, elongated to the eye by a range of thirty-four small arches, and thirty-five columns, while it is separated by a richly-canopied window in the centre, into two massive divisions, whose height and length are nearly as four to five; the arcades which give it length being confined to the lower stories, and the upper, between its broad windows, left a mighty surface of smooth marble, chequered with blocks of alternate rose-color and white. It would be impossible, I believe, to invent a more magnificent arrangement of all that is in building most dignified and most fair.