23 
Tuberculin Reaction in Monkeys. 
During the past year 21 new monkeys have been tested 
by this means. At the beginning of the year there were two 
monkeys held in the detention room for re-testing. Because 
of cases of tuberculosis in the Monkey House 16 animals have 
been returned. This makes a total of 39 Tuberculosis tests 
from March 1st, 1910, to March 1st, 1911. Besides those 
tested there remain no new monkeys, but 5 held-over speci- 
mens in the detention room on March 1st. These 5 animals 
have been kept in the laboratory building for various lengths 
of time and will be injected very shortly. 
Of the 21 new monkeys this year 3 have died in the Ex- 
hibition Cages but none in the Laboratory. Two of these three 
were free from tuberculosis, while the other. Green Monkey 
No. 80, showed advanced tuberculosis lesions. This animal 
lived but a short time in the Monkey House (see list below). 
Its temperature records following the injection of 1.2 mg. 
tuberculin w^ere unexceptionable. There were four other 
deaths from tuberculosis during the twelve months cov- 
ered by this report. The Chimpanzee, "Billy," in a sepa- 
rate cage during his entire life in the Garden, died of tuber- 
culosis after two and a half years on exhibition. This animal 
was not tested upon arrival because a separate isolated cage 
had been prepared for him. Moreover he was a young animal 
in excellent condition when he came. With him wo.s put on 
October 5th, 1908, for one day only. Reddish Macaque No. 1. 
He treated this monkey so badly that it was removed to a 
cage containing 4 baboons, 2 common macaques and a black 
ape. The macaque died of Tuberculosis October 5th, 1910. 
The monkeys in this cage were removed to the Laboratory 
immediately, and retested after three weeks. All but the 
Black Ape No. 11 passed with good charts. This animal 
is still held. 
For two weeks before the death of the Chimpanzee he had 
as companion in his cage Common Macaque No. 215. Ten 
days aft^r the death of the Chimpanzee this monkey was 
killed and found free from tuberculosis. 
