RESPIRATION. 131 



(1) " Every measurement of the ' median ' active man 

 is greater than the corresponding measurement of the 

 * median' inactive man." 



(2) "Every measurement of the median active man 

 from a hilly country is greater than the corresponding 

 measurement of the median active man from a flat coun- 

 try." 



(3) "But the active flat country men exceed in their 

 median measurements the inactive hill country men, 

 therefore, physical activity isa stronger factor in the devel 

 opment of respiratory organs than is the topography of 

 the habitat." 



