106 
WILLIAMSON BRYDEN. 
about two hours each patient got raw lin. oil, 1 pint sod. bi-carb, 3 ii; 
the after treatment consisted of hypo. sulp. sod. in two drachm 
doses twice a day, the stable well disinfected with carbolic acid- 
In a few days gave tonics composed of ferri. sulp and nux vomica. 
On removing some of the flooring, the space between it and 
the ground was completely filled with efete matter which, there 
being no drain, could not get away; the floor overhead was also very 
tight; there had been eight horses confined in this stable with 
their heads together; one thing I remarked that all the horses on 
one side of the stable were the first victims. Why it should be so 
I am not able to tell. 
A. Drink water, Y.S., Ontario. 
ETIOLOGY OF SPAVIN. 
By WILLIAMSON BRYDEN, Y.S. 
Read before the United States Veterinary Medical Association. 
In the disease of the horse’s hock, known as bone spavin, one 
of its most important characteristics is a new formation of osseous 
tissue. Such new formations have been carefully studied, still, 
when occurring among the lower animals, especially the horse, 
differences of opinion are held by veterinary surgeons as to their 
aetiology and pathology. 
The remote predisposing causes of bone spavin are, the natural 
peculiarity of form of limbs, and inferior quality of the tissues of 
the limb when the young animal happens to be the offspring of 
parentage not robust, but marked by disease, especially of their 
limbs. 
Less remote causes are, acquired peculiarity of form of limbs 
and quality of their tissues, or defects and inharmonious and weak 
development—of a faulty functional and nutritive nature—espe¬ 
cially among young growing animals, when the climate, character 
of the country, or the owner’s method of management subjects 
