SECTION XIII 
THE CENTEAL NERVOUS SYSTEM AND 
THE SPECIAL SENSES 
Diseases of this system and its specialized end organs 
of sense in the eye, ear and nose are recognized by 
veterinarians as occurring among domesticated animals, 
in which however they are by no means so common as in 
human beings. Because of the natural reserve of wild 
beasts and because their habits and manners are not so 
familiar to the observer, it would seem that clinical evi- 
dences of disease of the nervous system are rarest among 
them. The brain, cord and nerves of our specimens have 
not been studied \\4th the minuteness accorded to the 
examination of other viscera since we have not had the 
personnel to devote the time to this really colossal under- 
taking, our work \nih these tissues being directed toward 
the accumulation and preservation of apparently normal 
brains from every species; there are now some nine 
hundred brains on the shelves. However, whenever the 
history of the animal before death has suggested that 
disturbance in the nerve organs might exist, they have 
been dissected gTossly and examined microscopically. 
Had we subjected all our material to microscopic study 
it is quite possible that we might have discovered more 
lesions. This is still possible by reason of our gross 
material and autopsy protocols. 
We have been fortunate in having Dr. W. B. 
Cadwalader, Secretary of the Society, and Dr. J. H. W. 
Rhein with, their broad experience in neurology, take 
interest in this phase of the subject and study our 
material. The number of cases in which definite lesions 
have been found is surprisingly small, so that no general- 
izations can be attempted except perhaps in a negative 
sense. After the study of thirty-nine brains and cords 
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