OSTEOPOROSIS. 
41 
is manifested in one fourth the cases, whilst in others the hoof is 
so tender, that the horse will not put it to the ground; it is only the 
toe he attempts to put to the floor; in this case examination of the 
foot reveals a well marked elevation of temperature. A distinct im¬ 
pulse of the plantar artery and a very painful sensation on pressure at 
the point of the frog. Stiffness and debility of the lumbar region 
often exists to such a degree, that when they lie down they are unable 
to rise without assistance. 
If the practitioner’s attention is drawn to any one or other of these 
symptoms, he will not neglect to make an accurate inspection of the 
head, which will, if not at all times, very often present a thickened 
condition of one or both jaws, principally along the alveolar cavities. 
A very prominent spot is observed in the immediate limits of the 
anastomosis of the dorsalis nasi and angularis veins which dimensions 
depend on the duration of the disease; during the progress of this 
hypertrophy the skin is rendered tense over it, but not adherent. 
One of the fatal symptoms in the presentation of this disease is the 
tendency for the toe to point upward and the metacarpo phalangeal 
articulation towards the floor, even sometimes in direct contact with 
the floor. The coronary band is painful and swollen, there is an extra¬ 
vasation of foamy blood in the foot and fetlock, or at the junction of 
the hair and horn, which indicates a rupture of the flexor pedis perfor- 
ans near its insertion, and consequently permitting preternatural 
mobility of the foot; if this bloody exudation is wanting, it will make 
its appearance sooner or later, as well as the impairment of all the 
other functions necessarv to animation. 
Autopsy. If the hypertropic deformity of the bones of the face, 
or the preternatural mobility of one or the other foot is wanting, it is 
an impossibility, by simple inspection of the cadaver to decide what 
disease the animal was laboring under; even from the appearance of 
the pathological anatomy of the visceral organs we cannot arrive at 
any definite conclusion, thus it is necessary to subject the osseous 
system to an inspection as Prof. Varnell did ; See Veterinarian , 1860, 
also William's Veterinary Surgeryp. 171. For microscopic woodcuts 
see Ilarley and Brown , p. 197. My observations with but the 
naked eye correspond in various points with those alluded to by Prof. 
Yarnell. I also noticed the erosions and ulcerations of the articular 
cartilage, principally in the phalangeal articulations. By superficial 
appearance the thickened maxillaries exhibit a distention of the 
