THE COMMUNICABLE DISEASES 
543 
exhibition by excluding infected specimens. These experi- 
ences form further corroboration of the facts that tuber- 
culosis begets tuberculosis, that a healthy individual is not 
a source of infection. It follows that an obviously tuber- 
culous animal should not, need not, be a source of danger ; 
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Chabt T. GRIVET monkey (Ceroopithecus sabaus). Tuberculous. 
the hidden or unrecognized case is the menace. There 
is little or no problem when an unequivocally good or 
bad temperature record is obtained ; it is when there are 
slight variations from the standard for the group that 
decision as to the disposition of the specimen must be 
made. Nearly always such specimens are retested until 
the records are definite. If they be constantly irregular 
the animal is either sacrificed or exhibited in a separate 
cage far from other monkeys. It is by the sacrificing of 
