disease incident to horned cattle, affecting the internal substance of the horn, commonly called the pith, which it insensibly wastes, leaving the horn hollow.

Horn-Work (ouvrage à corne), in fortification, an outlook composed of a front and two branches; the front consisting of two half bastions and a curtain. This work is of the nature of a crown-work, but smaller, and serves the same purposes. The use of horn-works, in general, is to occupy some rising grounds in advance of the principal fortification, the distance of which determines that of the horn-work; and they are placed either before the curtain or before the bastions, according to circumstances.