I UK KK1.A1IYK >TRENGTH OF 



the mnthiT works out part of UK- time in 129, and the whole time in 

 79 cases, which are more reasonable numbers on which to base a 

 conclusion. 



\\. must now turn to the second problem under consideration, 

 the influence of the occupation of the father on the physique of 

 hi> sons. Unhealthy trades have been considered largely responsible 

 f<>r physical unfitness in tin- children. After some consideration we 

 decided to measure the unhealthiness of a trade by the annual 

 dt uthrate per 1000 living in the different trades between the a.g< 

 and 45. These numbers were taken from the Registrar General's 

 returns for Scotland, and range from 3 per thousand for mini>i-i> 

 and gamekeepers to 18 per thousand among barmen, cellarmen and 

 general labourers. The classification is not by any means perfect but, 

 though rough, it gives a fairly satisfactory estimate of the healthiness 

 or unhealthiness of a trade. 



TABLE II. 



Low Mortality Rate of Fathers and Greater Height 

 and Weight of Sons. 



Here the results are very regular and practically the same for 

 height and weight. There is a certain very slight association between 

 the unhealthy trade of a father, as measured by the mortality rate, 

 and inferior physique in his children in the worst school group, but it 

 becomes practically nil in the better school groups. We must again 

 notice the low value of the correlation coefficient when we compare it 

 with the value found for the correlation between height of father and 

 son. . And in this case also we must point out that we do not know 

 how much of this apparent association is due indirectly to heredity, 



