COMMUNITY ANALYSIS 37 



nificant correlation at least during the colder 

 months, between the behavior of the white men 

 in this community and the amount of carbon 

 dioxide in the rooms. One might easily conclude 

 that under the complex of environmental con- 

 ditions associated with cold weather, the animals 

 in question move into the classrooms due to a 

 positive reaction to carbon dioxide and that they 

 become negative to this gas after about an hour's 

 exposure and give an avoiding reaction. 



The carbon dioxide data might mislead one in 

 another direction. In comparing the concentra- 

 tion of carbon dioxide in difiPerent rooms of the 

 university buildings, we should probably find 

 that there is a greater concentration of this im- 

 portant gas in certain poorly ventilated but well 

 populated university class rooms and lunchrooms 

 than in the university chapel and on such data one 

 might well conclude that people, particularly 

 young people, aggregate in these popular classes 

 or meeting places because they react positively 

 to the amount of carbon dioxide to be found there. 

 Similarly, illumination experts would discover 

 that the university community occupies a region 

 of higher illumination, due to the less dense 

 smoke pall, than that which covers the animal 

 communities of Chicago's "loop district" and 

 might easily draw unwarranted conclusions from 

 this fact. 



