_Querns_, or hand-mills, both of ancient and modern type, either in a perfect state or else more or less broken, have been found in most crannogs. “_Grain-rubbers_, for triturating corn, are, perhaps, the most primitive implements used in the manufacture of cereal food. Each consisted of a flag or flat stone slightly hollowed upon the upper surface, so as to hold the parched grain, and a convex rubber, or mullet, which was passed backwards and forwards with the hand, and thus bruised the corn into meal. Querns are evidently the next step in food-making machinery.… Although there are several varieties, the most simple and natural division of them is twofold. The first is that in which the upper and lower stone are simply circular discs from twelve to twenty inches across, the upper rotating upon the lower by means of a wooden handle, or sometimes two, inserted into the top, and fed or supplied with corn by an aperture in the centre, analogous to the hopper, and which may be termed the ‘grain-hole’ or eye. In this quern the meal passed out between the margins of the stones. The upper stones are usually concave and the lower convex, so as to prevent their sliding off, and also to give a fall to the meal.” The second variety is usually styled a _pot-quern_, and has a lip or margin in the lower stone, which encircles or overlaps the upper, the meal passing down through a hole in the side of the former. Most of this variety are of smaller size than the foregoing, which is evidently the more ancient and simple form, as well as that which presents us with the greatest diversity. The upper stone in the pot-quern was turned, as in the first-named kind, either by one or sometimes by two wooden handles. This kind of quern was denominated “bró.” The word, used in the signification “to grind,” occurs in Proverbs, chap. xxvii., v. 22: “Though thou shouldest bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.” [Illustration: Fig. 60.--Section of ordinary Quern. About one-fourteenth the usual size.]