532 DISEASE IN WILD MAMMALS AND BIRDS 
is the performance of the whole daily rhythm on a high 
level, set, as it were, by the initial three PM. record. This 
form is confusing at times and has been responsible for at 
least one of our mistakes. Combined with this high level 
of curve is a tendency for the second twenty-four hours 
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Chart I. Composite chart of eight non-tuberculoua Cercocebus. 
to be higher than the first day (See Variegated Cebus Q 
and Sooty Mangabey R and Chacma Baboon W). The 
second type of reaction, illustrated by chart S, fails to 
resemble the normal daily cycle of the monkey tempera- 
ture but has sudden rises and falls as its characteristic 
feature. We have learned to look with suspicion on all 
charts wdth sudden marked changes of record even if they 
follow in the main a rhythmic course. The sudden fall 
exhibited by a very sick monkey illustrated by Grivet 
