10 



THE RELATIVE STRENGTH OF 



.ill x-houls in Glasgow and -14 for Edinburgh, and we may say that 

 th-- tv-ult^ obtained from the two distinct sets of statistics are well 

 in agreement. 



TABLE I. 



Partial Correlation Coefficients of Employment of Mother and 

 Physique of Children for Constant Age of Child. 



Influence of the Employment of Mothers on the 

 Physique of her children 



(2) That the employment of mothers is also correlated with lesser 

 height of sons, and that this correlation is somewhat larger than that 

 found for weight in Glasgow. The effect of the employment of mothers 

 on the height of sons in Edinburgh is measured by the coefficient -09, 

 which is distinctly lower than that found for all Glasgow. The 

 Edinburgh schools are, however, probably closest in grade to the 

 Glasgow Group A. 



(3) That there is a distinct difference in the correlation coefficients 

 in the different school groups in Glasgow. This is not what we should 

 expect if the population were homogeneous, and leads one to hold 

 that some special influence must be at work which has lowered the 

 correlation in the worst school group or raised it in the better school 

 groups. Taking into consideration the value found for the Edinburgh 

 schools we should be inclined to think that some racial factor we have 

 not yet measured has artificially raised the coefficient in the better 

 school groups. 



