Let us now consider the 126 nurses who have completed their course of training, as well as 147 others who have remained in training one year or more. Among these 273 nurses 162, or 59.3 per cent, were positive to tuberculin on admission and 111, or 40.7 per cent, were negative. Eight tuberculous lesions have been observed in this entire group. One case developed among the 162 ini-tially positive reactors. Seven cases developed among the 111 initially negative reactors. The one lesion developing among the positive reactors appeared after one year's training, and the nurse is stillunder sanatorium care, four years later. Of the 7 cases which appeared among the negative reactors, 3 nurses were allowed to remain in train-ing, 2 did well on six monthsof sanatorium care, 1 has remained under treatment for nearly three years, and 1 is no longer alive. The protocols of these 8 cases are summarized in Table 2.