156 071 the InTieritance of the Me7ital and Moral Characters in Man 
resemblance of the physical and mental characters in children is one and the 
same. 
It has been suggested that this resemblance in the psychical characters is 
compounded of two fectors, inheritance on the one hand and training or environ- 
ment on the other. If so, you must admit that inheritance and environment 
make up the resemblance in the physical characters. Now these two sorts of 
resemblance being of the same intensity, either the environmental influence is the 
same in both cases, or it is not. If it is the same, we are forced to the 
conclusion that it is insensible, for it cannot influence eye colour. If it is 
not the same, then it would be a most marvellous thing, that with varying 
degrees of inheritance, some mysterious force always modifies the extent of home 
Diagram XIII. Comparison of Resemblance for Physical and Psychical Characters. 
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influence, until the resemblance of brothers or sisters is brought sensibly up to 
the same intensity ! Occam's razor will enable us at once to cut off such a theory. 
We are forced, I think literally forced, to the general conclusion that the physical 
and psychical characters in man are inherited within broad lines in the same 
manner, and with the same intensity. The average home environment, the average 
parental influence is in itself part of the heritage of the stock and not an extraneous 
and additional factor emphasising the resemblance between children from the 
same home. 
But we are not yet at the end of our conclusions. By assuming our normal 
distribution for the psychical characters we have found, not only self-consistent 
results — linear regression, for example, as in the case of the inheritance of 
intelligence, but we have found the same degree of resemblance between physical 
and psychical characters. That sameness surely involves something additional. It 
involves a like heritage frovi jmrents. The degree of resemblance between children 
and parents for the physical characters in man may be applied to the degree of 
resemblance between children and parents for psychical characters. We inherit 
our parents' tempers, our parents' conscientiousness, shyness and ability, even as 
we inherit their stature, forearm and span. 
