Consistently with this character Doric columns, if contrasted with the other two orders, are the broadest and lowest. The more ancient examples do not rise above a height which is six times their diameter, and not unfrequently they are merely four times that breadth; for this reason they give, by virtue of their unwieldiness, the impression of an earnest, simple, and unadorned manliness, such as we have exemplified in the temples at Paestum and Corinth. The later examples of the Doric order, however, extend their columns to a height of seven times this unit of measure, and, for buildings other than temples, Vitruvius adds yet another half diameter. More generally, however, the distinctive character of the Doric type consists in this that it approximates most nearly to the primitive simplicity of the wood building, although it is more receptive than the Tuscan to decorative work and embellishments. The columns, however, have almost without exception no distinctive base; they stand up directly on their foundation[95], and their capitals are arranged in the simplest way out of ovolo ornament and plinth. The shaft is sometimes left smooth, sometimes grooved with twenty drills, which frequently were flat for one third of the way from the base, and hollowed out in circular form the rest of the way[96]. As regards the interval between the columns, according to the older monuments, the breadth is twice the diameter of a column, and only a few exceed this by a width between two and two and a half diameters. Another peculiarity of the Doric type of building in which it approaches the type of wood construction consists in triglyphs and metopes. In other words triglyphs indicate in the frieze the tops of the beams of the entablature with which the architrave culminates inserted there by means of prismatical incisions[97], while the metopes fill up the spaces between one beam and another, and in the Doric construction still retain the form of the square[98]. As a decoration they are frequently covered with reliefs, while beneath the triglyphs, which rest on the architrave, and as a culmination to the surfaces of the cornice on their lower side, we have for embellishment six small conical bodies, technically known as drops.