One of the main uses of the objective scale is to demonstrate that the same conditions do not prevail in various institutions which, except for this objective evidence, might be expected to care for the same type of inmates. This is illustrated by the comparison of the above studies in Ohio and Michigan with that made at a similar state school for delinquent boys in Indiana reported by Hickman (_12_, _28_). The Binet 1911 tests, Goddard's adaptation, were applied to 229 new boys 8 to 17 years of age inclusive, admitted to the Indiana Boys School at Plainfield. Among these, 68 boys (30%) tested below our borderline for the clearly deficient and 53 more within the doubtful region, a total of 48%. There seems little doubt that this represents a significant difference from the condition at the corresponding Ohio and Michigan schools where only 15% and 6% respectively tested clearly deficient on a corresponding standard. An interesting commentary on the necessity of reinterpreting the borderline for feeble-mindedness on the scale arises when we note that Hickman says: “One hundred and sixty-six, or about 75% of the whole number tested, tested as much as three years or more below normal, and therefore would be classed as feeble-minded to a greater or less degree.” (d) MEN AND BOY DELINQUENTS IN COUNTY AND CITY INSTITUTIONS. It seems likely that in city and county institutions deficiency is most common among repeaters in the jails or workhouses. One study has been made of a randomly selected group of repeaters who were in the jail of a Virginia city for fixed sentences of not more than a year. The examinations are summarized in the Special Report of the Virginia State Board of Charities and Corrections (_58_). In this Virginia city 50 whites of both sexes and 50 negroes of both sexes were examined. Among the whites, 18 tested IX or under and 5 more tested X. Among the negroes, 24 tested IX or under and 10 tested X. The percentages would be just twice these numbers, a total of 61% below passable capacity in this group of 100. If such is the condition in other jails in other parts of the country, it indicates one of the most serious hot beds of deficiency among delinquents. The repeaters in this city jail during three years were responsible for 60% of the commitments to jail, although only about one-fourth of the 33,306 arrests in this city during the three years resulted in commitment to jail. The feeble-mindedness among the repeaters, therefore, may be little indication of the frequency of deficiency among those arrested in the city. The repeaters represented only a third of those committed to jail during this period and this third was probably the most deficient among those committed, since recidivism goes with deficiency. Moreover, those committed to jail are probably more likely to be deficient than those who escape jail sentences. To assume, therefore, that 61% of this city's delinquents