Can any reason, for example, be assigned why the Doric capital should be appropriated to a pillar, whose height is equal to eight diameters; the Ionic volute to one of nine; and the Corinthian foliage to one of ten? The propriety of each of those appropriations can be founded upon nothing but habit and custom. The eye having been used to see a particular proportion connected with a particular ornament, would be offended if they were not joined together. Each of the five orders has its peculiar ornaments, which cannot be changed for any other, without giving offence to all those who know any thing of the rules of architecture. According to some architects, indeed, such is the exquisite judgment with which the ancients have assigned to each order its proper ornaments, that no others can be found which are equally suitable. It seems, however, a little difficult to be conceived that these forms, though, no doubt, extremely agreeable, should be the only forms which can suit those proportions, or that there should not be five hundred others which, antecedent to established custom, would have fitted them equally well. When custom, however, has established particular rules of building, provided they are not absolutely unreasonable, it is absurd to think of altering them for others which are only equally good, or even for others which, in point of elegance and beauty, have naturally some little advantage over them. A man would be ridiculous who should appear in public with a suit of clothes quite different from those which are commonly worn, though the new dress should in itself be ever so graceful or convenient. And there seems to be an absurdity of the same kind in ornamenting a house after a quite different manner from that which custom and fashion have prescribed; though the new ornaments should in themselves be somewhat superior to the common ones. According to the ancient rhetoricians, a certain measure or verse was by nature appropriated to each particular species of writing, as being naturally expressive of that character, sentiment, or passion, which ought to predominate in it. One verse, they said, was fit for grave and another for gay works, which could not, they thought, be interchanged without the greatest impropriety. The experience of modern times, however, seems to contradict this principle, though in itself it would appear to be extremely probable. What is the burlesque verse in English is the heroic verse in French. The tragedies of Racine and the Henriad of Voltaire, are in the same verse with, _Thus said to my lady the knight full of care._