The Evolution of Human Intellect 293 
G.?” “Because I planted my ten cents, and we will have lots of 
ten cents growing.” 
(3 yrs.) B. climbed up into a large express wagon, and would 
not get out. I helped him out, and it was not a minute before 
he was back in the wagon. Isaid, “B., how are you going to get 
out of therenow?” He replied, “I can stay here till it gets little, 
and then I can get out my own self.” 
\ (g yrs.) F. is not allowed to go to the table to eat unless she 
has her face and hands washed and her hair combed. The other 
day she went to a lady visiting at her house and said, “‘ Please 
wash my face and hands and comb my hair; I am very hungry.” 
: (3 yrs.) If C. is told not to touch a certain thing, that it will 
bite him, he always asks if it has a mouth. The other day he 
was examining a plant, to see if it had a mouth. He was told 
not to break it, and he said, ‘‘Oh, it won’t bite, because I can’t 
find any mouth.” \ 
Nowhere in the animal kingdom do we find the psycho- 
logical elements of reasoning save where there is a mental 
life made up of the definite feelings which I have called 
‘ideas,’ but they spring up like magic as soon as we get ina 
child a body of such ideas. } If we have traced satisfactorily 
the evolution of a life of ideas from the animal life of vague 
sense-impressions and impulses, we may be reasonably sure 
that no difficulty awaits us in following the life of ideas 
in its course from the chaotic dream of early childhood to 
the logical world-view of the adult scientist. 
In a very short time we have come a long way, from the 
simple learning of the minnow or chick to the science and 
logic of man. The general frame of mind which one acquires 
from the study of animal behavior and of the mental de- 
velopment of young children makes our hypothesis seem 
vital and probable. If the facts did eventually corroborate 
it, we should have an eminently simple genesis of human 
