hewers of
wood and drawers of water." And yet, as far as intelligence is
concerned, the tests have told the truth. These boys are uneducable
beyond the merest rudiments of training. No amount of school instruction
will ever make them intelligent voters or capable citizens in the true
sense of the word. Judged psychologically they cannot be considered
normal.

It is interesting to note that M. P. and C. P. represent the level of
intelligence which is very, very common among Spanish-Indian and Mexican
families of the Southwest and also among negroes. Their dullness seems
to be racial, or at least inherent in the family stocks from which they
come. The fact that one meets this type with such extraordinary
frequency among Indians, Mexicans, and negroes suggests quite forcibly
that the whole question of racial differences in mental traits will have
to be taken up anew and by experimental methods. The writer predicts
that when this is done there will be discovered enormously significant
racial differences in general intelligence, differences which cannot be
wiped out by any scheme of mental culture.

Children of this group should be segregated in special classes and be
given instruction which is concrete and practical. They cannot master
abstractions, but they can often be made efficient workers, able to look
out for themselves. There is no possibility at present of convincing
society that they should not be allowed to reproduce, although from a
eugenic point of view they constitute a grave problem because of their
unusually prolific breeding.

DULL NORMALS (I Q USUALLY 80 TO 90). In this group are included those
children who would not, according to any of the commonly accepted social
standards, be considered feeble-minded, but who are nevertheless far
enough below the actual average of intelligence among races of western
European descent that they cannot make ordinary school progress or
master other intellectual difficulties which average children are equal
to. A few of this class test as low as 75 to 80 I Q, but the majority
are not far from 85. The unmistakably normal children who go much below
this (in California, at least) are usually Mexicans, Indians, or
negroes.

_R. G. Negro boy, age 13-5; mental age 10-6; I Q approximately
80._ Normal in appearance and conduct, but very dull. Is
attempting fifth-grade work in a special class, but is failing.
From a fairly good home and has had ordinary school ad