vacantly over keystones, form one of the leading decorations of Renaissance architecture, and that one of the best; for helmets and lances, however loosely laid, are better than violins, and pipes, and books of music, which were another of the Palladian and Sansovinian sources of ornament. Supported by ancient authority, the abuse soon became a matter of pride, and since it was easy to copy a heap of cast clothes, but difficult to manage an arranged design of human figures, the indolence of architects came to the aid of their affectation, until by the moderns we find the practice carried out to its most interesting results, and, as above noted, a large pair of boots occupying the principal place in the bas-reliefs on the base of the Colonne Vendôme. § VI. A less offensive, because singularly grotesque, example of the abuse at its height, occurs in the Hôtel des Invalides, where the dormer windows are suits of armor down to the bottom of the corselet, crowned by the helmet, and with the window in the middle of the breast. Instruments of agriculture and the arts are of less frequent occurrence, except in hieroglyphics, and other work, where they are not employed as ornaments, but represented for the sake of accurate knowledge, or as symbols. Wherever they have purpose of this kind, they are of course perfectly right; but they are then part of the building's conversation, not conducive to its beauty. The French have managed, with great dexterity, the representation of the machinery for the elevation of their Luxor obelisk, now sculptured on its base.