NURTURE AND NATURE 1 3 



not really so satisfactory as one might at first sight 

 suppose, as it appears that comparatively few married 

 women in Glasgow have other than the customary 

 domestic work of their homes. 



Dr Leslie Mackenzie, in his report on these 

 statistics, divides the schools into four groups 

 according to the districts in which the schools are 

 situated, and we have kept to these groups in 

 working out the correlation coefficients — but have 

 also worked the coefficients for all schools taken 

 together. 



Group A comprises schools in the poorest 

 districts of the city. 



Group B comprises schools in poor districts. 



Group C comprises schools in districts of a 

 better class. 



Group D comprises schools in districts of a still 

 higher class, and includes four out of five Higher 

 Grade Schools. 



What then is the effect of the employment of 

 the mother on the height and weight of her sons in 

 Glasgow and in Edinburgh ? 



In the Introductory Note to the C.O.S. Report 

 of the Edinburgh children it is stated that the 

 children come from a school in the poorest part 

 of the city, but that this school also has an admixture 

 of the children of the comfortable and respectable 

 working class. 



Table I gives the correlation coefficients of the 

 effect of the employment of mothers on the weight 

 and height of their sons, and we notice : 



(i) That the employment of mothers is cor- 



