An Arabic numeral after a Roman numeral indicates the number of cases, when more than one case occurs at any position in the table. Parentheses indicate cases testing presumable deficient or doubtful. S is a satisfactory school grade. The summary of the Binet scale testing of this group according to the valuation which we have adopted, shows two clear cases of tested deficiency. One boy who was 13 years of age tested VIII and was the only case sent to the State School for Feeble-Minded from this group. The other was 16 years of age and tested IX. Besides the two presumable deficients, seven other boys were uncertain according to our interpretation, as judged by the Binet tests alone. One of them was 13 and tested IX, the others were 14, 15 and 16 and tested X. This would make a total of 7% possibly socially deficient, since they were all delinquent. This seems to be the largest estimation of deficiency which would be justified on the basis of these test results. To show, however, how important is the interpretation of the results obtained with Binet examinations when treated in gross, it need only be stated that a few years ago, when this study began, it was not uncommon to count all who were retarded three or more years and testing XII or under as feeble-minded. On that absurd basis, there would be 45 such cases (37%). As we have considered at length the reasons for not counting a person as even of doubtful intellect who tests XI or above or is less than three or four years retarded, we do not need to rehearse them here. B. COMPARISON OF TESTED DEFICIENCY AMONG TYPICAL GROUPS OF DELINQUENTS.