There were in all 116 children examined, 58 boys and 58 girls. Von Pirquet reactions were made on all cases with old tuberculin and bovine tuberculin. Whenever a positive reaction was present for one, it was also present for the other. There were no exceptions to this rule. Of the 58 boys, 20 reacted positive and 38 negative. Of the 58 girls, 22 reacted positive and 36 negative—a total of 42 positives and 74 negatives. In 18 out of 20 positive reactions in boys, a clinical diagnosis of tuberculosis of the bone had been made. In the other two positive cases, one suffered from clubfoot and the other from infantile paralysis. In 15 out of the 22 positive von Pirquet reactions in girls, the clinical diagnosis was tuberculosis of the bones or joints. Of the other 7 cases, one had clubfoot, 2 dislocated hips, 2 rickets, and 2 curvature of