23 
affected, the disease not being highly communicable. 
The practice of examining all the Kangaroos thrice 
yearly is in vogue. 
Dr. Corson- White's very interesting studies upon the 
degenerative bone disease of monkeys would indicate 
that the cases studied are really affections of the osseous 
system, not primary in the nervous system, although 
they are possibly related to changes in the ductless 
glands; they seem dependent upon unbalanced diet. 
The absence of sufficient calcium, which acts as a fixative 
for phosphorus, and of some vitamins seems potent in 
the production of the disease. This however will not 
account for the limitation of the disease incidence to 
New World monkeys, the Cebidse, and we must assume 
that they are particularly susceptible to unbalanced 
diet. Reccommendations for changes have been made, 
the principal one being the feeding of lime water, for 
its calcium content. Some years ago I tried the ad- 
ministration of adrenalin and calcium lactate with no 
benefit. Since the lime water has been used, three 
cases of another sort have appeared — hypertrophic 
osteitis or osteitis deformans — an atypical overgrowth 
which as the name indicates produces soft bones of de- 
formed type. This would imply that in monkeys sus- 
ceptible to unbalanced diet, the disease is probably not 
to be cured if already started, (these animals had been 
noticed as slightly " rickety' ' before the limewater was 
given) and that while calcium may help to build up 
bone, the result will not be functionally correct if the 
original cause, whatever it be, remain operative. Dr. 
Corson- White suggests that the diet be enriched as far 
as possible by salt, milk or its butter fat, and leafy 
vegetables. 
The Pathological Society of Philadelphia held its 
meeting at the laboratory on May 12 last, at which 
time Dr. Corson- White presented the data then available 
about the bone disease just described and showed two 
interesting specimens. Dr. Weidman discussed the im- 
portance of parasites as causes of death, illustrating by 
