SEX-RATIO OF NEW-BORN INFANTS 435 



of life in general. Owing to the complexity of factors here involved the 

 average values of SRi are of little value but every instance of a low or high 

 SRi merits our attention. The aim of the present contribution is not to 

 generalise but on the contrary to differentiate the important data furnished 

 by a study of SRi which enables us to deepen the study of the important 

 phenomena in the biology of man. 



