24 
of the internal capsule, on the left side, are destroyed in part. 
The anterior limb of the internal capsule, in one section, is 
preserved, notwithstanding the fact that the optic thalamus 
on the same side has been, in large part, destroyed. And 
in spite of the fact that the posterior limb of the internal 
capsule has been destroyed at some levels, it is interesting 
to note that the degeneration in the pyramidal tracts of 
the pons and medulla on the opposite side, and the lateral 
columns of the spinal cord, are not intensely — although dis- 
tinctly — degenerated. 
It is very interesting to note that, in view of the severe 
insult to the posterior limb of the internal capsule on the 
left side, there was not more paralysis, for it will be remem- 
bered that there was considerable power of prehension in 
the right upper and lower extremities. 
I am not prepared to discuss the question of tuberculous 
abscesses of the brain, either in the baboon or in man. It 
is well known that tuberculous infiltrations occur in the 
brain substance, which may undergo cheesy degeneration. 
Although I have not had an opportunity, thus far, of study- 
ing the literature of the subject, my impression is that tuber- 
culous abscesses of the brain substance itself are compara- 
tively rare in men. 
In addition, sections made through the brain tissue in 
the neighborhood of the large abscesses showed small foci 
of leucocytic and epithelioid infiltration, in which areas the 
tubercle bacillus could be demonstrated by stain. The same 
sections stained by Gram Weigert method, showed the pres- 
ence of some bodies at the margins of these small collections, 
but these could not be identified positively as contaminating 
bacteria. 
