Osier, s. A tree of the willow kind, growing by the water.
Osprey, s. The sea eagle. Vide Eagle.
THE OSPREY.
Buffon observes that the osprey is the most numerous of the large birds of prey, and is scattered over the extent of Europe, from Sweden to Greece, and that it is found even in Egypt and Nigritia. Its haunts are on the sea shore, and on the borders of rivers and lakes. Its principal food is fish; it darts upon its prey with great rapidity, and with undeviating aim.
Ossification, s. Change of carneous, membranous, or cartilaginous, into bony substance.
Ossification of the cartilages frequently accompanies ringbone, but it may exist without any affection of the pastern joint. It is oftenest found in horses of heavy draught. It arises not so much from concussion, as from a species of sprain, for the pace of the horse is slow. The cause, indeed, is not well understood, but of the effect we have too numerous instances. Very few heavy draught horses arrive at old age without this change of structure.
In the healthy state of the foot, these cartilages will readily yield to the pressure of the fingers on the coronet over the quarters, but, by degrees, the resistance becomes greater, and at length bone is formed, and the parts yield no more. No evident inflammation of the foot, or great, or perhaps even perceptible lameness accompanies this change; a mere slight degree of stiffness may have been observed, which, in a horse of more rapid pace, would have been lameness. Even when the change is completed, there is not in many cases any thing more than a slight increase of stiffness, little or not at all interfering with the usefulness of the horse. When this altered structure appears in the lighter horse, the lameness is more decided, and means should be taken to arrest the progress of the change: these are blisters or firing; but, after those parts have become bony, no operation will restore the cartilage.—The Horse.
Ossifrage, s. A kind of eagle.
Osteology, s. A description of the bones.