24 
PART II. 
When the last report was made no monkeys remained 
in the detention rooms awaiting test injections. Twenty- 
six animals were received during the year of which 22 
passed at the first or second test, the remaining four, 
constituting the last arrivals, being still held because of 
unsatisfactory charts. Although not being considered 
tuberculous they will be put in separate outside cages 
when good weather permits. There have been no 
monkeys returned from the exhibition house for retesting. 
The history of tuberculosis among monkeys in the 
exhibition shows that ^'Sylvia" the orang-outang, died in 
the summer of 1918 (discussed in the 1919 report); this 
is the only death from tuberculosis in 45 months, a very 
satisfactory record. Thirty- two specimens of the order 
primates have died, but most of them have been young 
or small poor animals. 
Tuberculosis among the other animals, however, shows 
a very unsatisfactory rise to 37, higher than for the last 
ten years. Only two of these were mammals, ungulata, 
while among the remaining thirty-five, 10 were Passer- 
ine birds, 6 Psittaci, 9 Galli, 2 Columbse, 2 Anseres, 
2 Odontoglossse, and one each of Alectorides, Accipitres, 
and Crypturi; the first three orders deserve some dis- 
cussion. The high figure among the passeres, mentioned 
early in this report, was due to the arrival of some sick 
birds which died within a few weeks. The high rate 
among the gallinaceous birds and parrots was only 
realized when making up this report, a fact indicating 
that no collection or group died close together or our 
attention would have been attracted to it before; this 
has proven to be the case upon further scrutiny of the 
records. However it shows that we have had some 
infected foci that should be under strict hygiene. It is 
the practice lately of the laboratory to keep a book 
arranged by cage distribution of the specimens, into 
which are posted all deaths occurring from infectious 
disease. By this means we shall have foresight of possible 
outbreaks. 
