OSTEO-POROSIS. 
455 
In overfeeding, the mechanical over-distension of the rumen 
is of as little significance as in milk fever. That is, the rumen 
in the course of a brief time becomes soft and flabby. The 
symptoms of disease also do not appear concurrently with the 
highest stage of rumenal distension. A day, or even two, 
generally elapses after over-feeding, much as in milk fever be¬ 
fore the disease becomes apparent. In sheep I have likewise 
often noted a more or less marked paresis after the use of a very 
liberal quantity of green rye. When sheep have been confined 
for a time to dry food in winter and are then turned into a pas¬ 
ture, they sometimes find their way to a rye field and ingest so 
much of the succulent food, that besides serious indigestion, 
paresis also ensues, in some cases in the posterior parts only, 
in others extending to the anterior limbs. 
In the latter cases, where the paresis has become so exten¬ 
sive, death frequently follows. 
{To be continued.') 
OSTEO-POROSIS. 
By Geo. H. Berns, D. V. S., Brooklyn, N. Y. 
A Paper read before the Eighth Annual Meeting of the New York State Veterinary 
Medical Society, Sept. 14-15, 1898. 
In 1890, before the Long Island Veterinary Society, I had 
the privilege of reading a short paper on “ osteo-porosis,” which 
was published in the American Veterinary Review and 
the Journal of Comparative Medicme and Surgery at that time. 
In this paper we briefly considered the history, symptoms pre¬ 
sented, differential diagnosis, usual unfavorable terminations, 
pathological anatomy as described by Williams, Vurnell and 
others of England, locations of stables and conditions under 
which most frequently found, and we concluded by venturing 
the following theory as to its probable causes : 
“ Considering the cases that have come under my observa¬ 
tion, and more particularly the conditions and location of the 
stables in which these cases were found, I cannot help but con- 
