252 2^/16 Philippine Journal of Science isis 



It is seen from Table II that plague cases were known to have 

 occurred in all but 3 of the houses investigated in Changchun 

 and that temperatures of 6° C. or less were recorded in 11 of the 

 17 houses investigated. 



Consequently, I am still of the opinion that atmospheric tem- 

 perature is an important factor in determining the spread or 

 failure to spread of pneumonic plague. 



