534 DISEASE IN WILD MAMMALS AND BIRDS 
falling of the temperature beyond the thermometric regis- 
tration point, usually means advanced lesions especially 
of the caseous pneumonic form. A very small lesion may 
give a definite reaction as in Cebus (V). 
The examples given are those of a definite character 
but there are many charts that vary from the normal 
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Chart K. GEOFFROY'S MARMOSET (Leontocebus geoffroyi). Non-tuberoulous. 
upon wliich a decision is extremely difficult to make. Such 
animals are held in quarantine to be retested after the 
lapse of three months. Early in the work a suspected 
specimen was reinjected after two weeks, failed to give a 
reaction but died in about two months of tuberculosis. The 
nullification of the test by previous^ injections of tubercu- 
lin is well known. Three months' interval permits a dis- 
