26 
in the American Journal of the Medical Sciences and from 
which the conclusions are here repeated. ''Our study 
tends to confirm the general opinion of the rarity of 
arteriosclerosis in lower animals but perhaps a closer 
study will reveal more cases, especially since we know the 
groups in which it appears. It is most common in cats 
and dogs, bovines, predatory birds, parrots, gallinaceous 
and aquatic birds and in these groups it is most definitely 
developed in those living on a protein diet. The lesion 
is very common in the orders showing the greatest 
numbers of cases of gastro-enteritis ; this is especially 
true of parrots, aquatic birds, herbivorous and carnivorous 
animals. The aorta is more affected in mammals, the 
disease is more distributed in birds. A rough similarity 
to the human aortic lesions is to be seen in the predatory 
birds and some of the carnivora while the parrots exhibit 
degenerations in middle size vessels not unlike those 
of 'arteriocapillary fibrosis.' " 
"The animals most affected are those prepared by na- 
ture for severe or prolonged physical effort, such as in fight 
and flight. Aneurysms occur rarely, usually at points 
of branching and always near atheromatous plates; 
they are small and seem to retain part of all coats of the 
vessels, seldom becoming large enough to form their wall 
from the surrounding areolar tissue. More males than 
females are listed in the series, but as we have many 
more males on record perhaps the differences would be 
less marked if the figures were closely comparable.'' 
Dr. E. P. Corson- White's report on Investigations 
upon the Relation of Diet and Osteomalacia. 
Osteomalacia has caused the death of 44 mammals 
and 34 birds. Fifty per cent, of the mammals were 
monkeys of the family Cebidae in which the disease 
was more severe and extensive than in any other 
group. 
Because the diet has been frequently held as re- 
sponsible for osteomalacia and it has been possible to 
reproduce experimentally similar bone changes by cer- 
tain diets, the food given our animals was studied as 
