THE COMMUNICABLE DISEASES 
547 
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Chart X. BLACK APE (Cynopithecus niger). Tuberculous. 
often scratched and soiled with dirt that readings might 
be misleading. The Von Pirquet test was done on the 
first mentioned specimen and was likewise negative. His 
tuberculin test was afterward positive. 
The ophthalmic reaction is highly spoken of in the 
New York Zoological Park and has been used elsewhere. 
It was tried by me at the time Doctor Blair first discussed 
it, but with variable results. One set of two monkeys 
was treated with Calmette's purified tuberculin into the 
