530 DISEASE IN WILD MAMMALS AND BIRDS 
during the first day. Explanation of this was sought 
in the nature of the lesion but could not be found further 
than that mild early lesions may give it but it camiot be 
read as indicative of low activity since one case of laryn- 
geal tuberculosis had this ' ' delayed reaction. ' ' At times 
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it has seemed to occur when the injection fluid formed a 
blister under the skin, a pocket in the areolar subcutane- 
ous tissue, whence absorption would be slow. Whatever 
the correct explanation, experience has justified the re- 
cording of temperatures for full forty-eight hours. 
The Eeaction. 
The experience gained with these monkeys supported 
definitely the general opinion that tuberculin injected into 
healthy animals will not disturb the temperature but wiU 
