The state reformatories reach a class of delinquents between those of the state prisons and the state industrial schools. In Minnesota all the inmates of the reformatory except 80, who were disqualified by inability to speak English or otherwise, were tested by Dr. E. F. Green. Men are sent there only between the ages of 16 and 30, so that his table of mental and life-ages gives us the opportunity to apply our criteria accurately. Thirteen per cent. of the 370 examined tested IX or under and were presumably deficient, while 22% more were in the uncertain group testing X (_22_). In a report of the Binet results with 996 inmates of the Iowa Reformatory, which Warden C. C. McClaughry kindly sent me, 200 tested IX or under and 146 tested X, a total of 35% including the doubtful group. The range of ages was from 16 to 49. The Warden notes that the tests were not made by an experienced psychologist. “In many cases it is suspected that the crafty criminal was endeavoring to lower his standing as to mentality in the hope of excusing or mitigating his crime in the eyes of the Board of Parole.” The results, however, agree well with what has been found in similar institutions. Supt. Frank Moore of the New Jersey Reformatory at Rahway says, “Nearly every young man who has entered our institution in the last eighteen months has been tested by this system (Binet), and the results have shown that at least 46 per cent. were mentally subnormal” (_38_). By his discussion this seems to mean that they tested below XII which would mean that all those testing XI were less deficient than our standard for doubtful cases. These young men were from 16-25 years of age and 17.5% of them had had one year or less in school. Ten per cent. could not be examined because of unfamiliarity with English. A later report in 1912 regarding the same institution (_42_) says that 600 of the inmates have been examined with the Binet tests in two years, but does not state how these were selected. Of those examined we are told “48% are of the moron type of mental defectives, ranging in mentality from three to eight years, below the average normal adult.” Again, no further information is given so that it is impossible to allow for those testing X or XI or for the cases only three years retarded. Both of these estimates at the New Jersey Reformatory are excessive when judged by conservative borderlines.