536 DISEASE IN WILD MAMMALS AND BIRDS 
Results. 
The value of the test can best be estimated by a recital 
of the mortality of monkeys, from tuberculosis, since its 
inception. Before the test was started practically every 
monkey in the collection for sufficient length of time to 
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Chart M. MONGOOSE LEMUR (Lemur mongoz). Tuberculous. 
be exposed died from the disease. The average duration 
of exhibition life of all specimens up to 1903 did not 
exceed eleven months. The time has risen almost unin- 
terruptedly until now it is thirty-five months. There are, 
at time of writing, sixty-eight specimens in the cages 
which have been on view from one to one hundred and 
eighty-five months with an average of fifty-four months. 
These figures speak for themselves as evidence of the re- 
duction of infection. The average mortality from enteri- 
