A round concretion (a calculus) from the liver of the ox is described by Ibn Al-Beithar as being of a yellowish color and composed of successive superimposed layers. If secured at the time of the full moon it was believed to promote _embonpoint_, and was much prized by the Egyptian women for this virtue. The effect was to be attained by taking two grains of the pulverized concretion, either with the bath or directly after bathing, and thereupon a “fat hen” was to be eaten.[340] The latter prescription, if regularly and frequently administered, might be thought to suffice without the powdered calculus. From the second stomach of heifers was sometimes obtained a dark brown or blackish concretion of very light weight and as round as a ball. This was credited with great remedial virtues provided it had not fallen to the ground.[341] There seems to have been a belief that the curative or talismanic properties of animal concretions, or of the teeth of animals, were weakened, or destroyed, if these objects came in contact with the earth. This belief was perhaps due to the idea that the mysterious power of the substance was originally derived from earth currents, or emanations, and that the active principle would return to the earth if the object came in contact with it. The _lapis carpionis_ or carp-stone, a triangular mass, was taken from the jaws of the carp. It was smaller or larger according to the size of the fish. The principal remedial use was against calculi, or for the cure of bilious diseases and colic.[342] These are bony plates from the upper part of the mouth of the carp. Such so-called “stones” were also said to check bleeding of the nose, a quality they owed to their astringent properties, quite noticeable if anyone tasted the powder made from them.[343] The _cinædias_, a white and oblong concretion, had in Pliny’s time the reputation of possessing extraordinary powers, announcing beforehand whether the sea would be clear or stormy.[344] In what way this weather prediction was manifested we are not told; perhaps the surface of the concretion may have become dull or grayish when there was much humidity in the air. The cinædia were said to be found in pairs in the fish of that name; one pair being taken from the head of the fish and another pair from the two dorsal fins. Power to cure diseases of the eye was conferred upon these concretions by putting nine of them, duly numbered, in an earthen jar together with a green lizard. Each day one of the “stones” was taken from the vessel in the numerical order, and on the ninth day the lizard was liberated. Evidently it was thought that to kill the animal would interfere with the transmission of its virtue to the concretions.[345]