. An address on the natural history and pathological osteology of the horse : delivered before the annual meeting of the Connecticut Board of Agriculture at Middletown, January, 1870. Horses; Horses -- Diseases. HORSES. 11 Fifrurc 2. be developed from similar exciting causes or from an inherited constitutionality. Every bone in the normal condition of nutrition grows large by the deposition of new material upon its external sur- face through the instrumentality of the periosteum. And any agency which will increase the flow of blood to that part and thus unduly excite the action of this mem- br
. An address on the natural history and pathological osteology of the horse : delivered before the annual meeting of the Connecticut Board of Agriculture at Middletown, January, 1870. Horses; Horses -- Diseases. HORSES. 11 Fifrurc 2. be developed from similar exciting causes or from an inherited constitutionality. Every bone in the normal condition of nutrition grows large by the deposition of new material upon its external sur- face through the instrumentality of the periosteum. And any agency which will increase the flow of blood to that part and thus unduly excite the action of this mem- brane, will cause this excessive and morbid production of bone. But there is evidently a certain peculiar- ity in the general nutrition of the body, favorable to the production of this disease; for it is often seen, even fearfully developed, in the colt at an early age, where no external or exciting cause could have played its part. Such a condition of the system might well be termed, in the language of pathology, an exosfosi- cat diathesis. Though every bone in the skeletal frame-work of the horse is liable to an attack of exostosis, yet the joints are the most frequently the seat. "Chest ; of this disease. In usually involves the rheumatism, or '' founder. which periosteum of the bones of the chest, you will occasionally find, upon post-mortem ex- amination, that the lower end of the ribs and their appendages are affected with this same malady. At Figure 2 will be seen a case of ''chest-founder," so called, in which the first and second ribs of the right side are firmly grown together, and are attached by a bony union to the first rib of the opposite side. This specimen was taken from a horse thirty years of age, which was noted for its general usefulness, yet we imagine that this creature must have suffered in its respiratory func- tions, inasmuch as the anterior part of the thorax, or chest, was a solid bone hoop. May not this form of the disease ac-. P
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