21 
of intestinal ulcers. The male Blessbok died of paralytic 
ileus, of indeterminate origin, and tuberculosis. 
The work of the laboratory has continued on lines 
similar to that of previous years, that is the collection of 
statistics of the various lesions in the animal groups, the 
study of important pathological lesions or definite infec- 
tions and the determination of parasites. Dr. Weidman 
still examines our bird arrivals for known dangerous 
parasites. Dr. Corson- White continues her studies upon 
the intestinal needs of various groups and has already 
indicated how cage palsy, in primates at least, may be 
combatted. I have continued the study of the vascular 
diseases as the first step in the cardio-vasculo-renal 
system. Scientific discussion of these will be made in 
the second part of this report. 
Members of the laboratory staff presented papers 
before the annual meeting and banquet of the Sigma Psi 
Fraternity of the University of Pennsylvania held in 
the Garden on June 11th; before the combined Pediatric 
Societies of Philadelphia, New York and New England 
which met at the Garden on November 15th; and before 
the Interurban Clinical Club which met at the Garden 
on December 4th. I read a preliminary paper upon 
Arteriosclerosis in Wild Animals before the College of 
Physicians on February 4th, 1920. 
The following is a list of the animals dying during the 
year. The total will be found not to tally with the 
records upon the table, as some specimens have died 
from injury and some were decomposed. Moreover, in 
many instances animals are included in the figures of 
more than one heading, since lesions of importance may 
have been found in more than one of the anatomical 
systems. It is seldom the case that only one of the 
systems is sufficiently affected to be the only cause of 
death. 
