A comparison of Tables LXII and LXIII gives some indication of what might have been expected if the carriers had not been removed from the treatment wards at weekly intervals. With the carriers removed from the “clean” cases and segregated in a separate ward so as to be removed effectively as sources of spread of the S. hemolyticus infection to clean cases, the percentage incidence with all cases considered rose to a point nearly twice as high as that ever reached in the wards where clean cases alone were allowed to remain. Had these carriers not been separated, and remained in contact with cases free from hemolytic streptococci, they would have served as just so many more sources of infection, and an incidence of at least twice that recorded for all cases combined, or four times that of the treatment wards, might have been expected. These results indicate that the weekly separation of carriers from clean cases did, to a considerable extent, lower the individual’s danger of acquiring S. hemolyticus infection while in the hospital. Complications of Measles In Table LXIV the complications developing in the measles patients under observation at Camp Pike are tabulated. In the division of the complications developing in “carriers” and “noncarriers” of the hemolytic streptococci, reference is made only to the records of the throat cultures. The division is therefore not dependent upon the bacteriology of the complications. For example, only 9 of the 12 cases of pneumonia developing in “carriers” were streptococcus pneumonias. On the other hand, the cases of mastoiditis following otitis media were almost invariably due to hemolytic streptococci. Of the 10 otitis cases occurring in “noncarriers,” 4 developed mastoiditis and 3 of these showed hemolytic streptococci on culture from the mastoid cells at operation. Missed cases of identification of S. hemolyticus by throat culture in cases which develop S. hemolyticus complications may arise from a number of causes. It is desired here only to direct attention to these discrepancies. =Pneumonia Following Measles.=—Fifty-six cases of pneumonia following measles occurred during the period of observation in this group of 867 cases of measles. Of these, 9 were streptococcus pneumonias. This gives an incidence for streptococcus pneumonias of 1.04 per cent, while that for all the pneumonia is 6.4 per cent. There were 8 cases of lobar and 48 cases of bronchopneumonia. Seventeen fatal cases occurred giving a mortality rate of 30.4 per cent for the group. Five of these fatal cases occurred among the 9 streptococcus pneumonias. The mortality rate for the streptococcus pneumonia thus was 55.5 per cent; that for the nonstreptococcus group was 25.5 per cent. All 9 cases of streptococcus pneumonia developed empyema. In 7 cases it was diagnosed clinically; in 2 at autopsy only. No cases of empyema developed in the group of nonstreptococcus pneumonias.