INHERITANCE OF TEMPERAMENT. 



ID/ 



In groups 3 and 4 the mating nervous-melancholic by calm-phleg- 

 matic is the commonest, and nervous-phlegmatic by calm-melancholic 

 and nervous-cheerful by calm-phlegmatic come next. Certain expected 

 combinations, such as both parents calm-melancholic, do not occur. In 

 group 5 the mating nervous-phlegmatic by calm-phlegmatic is much 

 more frequent than expected. 



E. A comparison of the actual frequency of various matings with expected frequency 

 on the assumption of mating at random. 



