4 Introdu'ction 



indicates the regions where measurements were made both in 

 the case of the Ouichua and the ]\Iachiganga. The altitude of 

 the regions inhabited by the Quichua who were measured varied 

 from 5000 to 10.000 feet and averaged about 8000 feet. The 

 !Machigangas hve at an altitude of 3000 feet. They are considered 

 in Part II. 



