ANTIBODY FORMATION 



increased. At present, I am doing an experiment in collaboration 

 with Dr. M, L. Cohn in which Guinea pigs kept at -4° C at the 

 Denver altitude or on top of Mount Evans, are infected with 

 Mycobacterium tuberculosis. We just finished infecting our ani- 

 mals by inhalation techniques last week, and whether or not the 

 results will come out similar to yours won't be known for another 

 month or so. 



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