=Bacteriologic Methods Used in the Study.=—The methods used for the identification of hemolytic streptococci here were essentially the same as those used at Camp Funston and described above, the one exception being the use of surface cultures on blood agar instead of the combined surface and deep culture. Blood agar plates containing 5 per cent defibrinated horse blood were poured and used while fresh. The throat swabs were carried to the laboratory in sterile test tubes. The plates were inoculated by touching the swab lightly to the surface of the agar plate at two places, one near either extremity of a given diameter of the plate. On touching the swab to the agar, the swab stick was rolled between the fingers so as to turn it through one revolution and thereby bring all points of the circumference of the cotton swab in contact with the agar surface. The material thus inoculated on the plates was spread by means of a platinum wire slightly turned over at the end in “hockey stick” fashion. The wire was passed back and forth several times over the point of inoculation and then multiple streaks and cross streaks were made over the agar surface. The initial contact of the wire with the point of inoculation was not repeated. The cross streaking serves to spread and distribute this material evenly over the surface. Well seeded plates by this multiple streak method are the rule and the uniform distribution of well separated colonies over the surface makes it very easy to pick pure cultures, and renders plate reading easy. Very early in the course of our study of throat cultures at Camp Pike, the great frequency of abundant growths of B. influenzæ was observed. Consequently, the throat cultures of all measles patients examined from September 15 to October 20 were studied for the identification of B. influenzæ. In all cases identification was based on the cultural, staining and morphologic characteristics. Tests for growth on hemoglobin free media were not made as a routine. =Relation of Measles and Pneumonia Following Measles to the Influenza Epidemic.=—The influenza epidemic at Camp Pike was recognized on September 23 because of an alarming increase of hospital admissions. It ran its brief course, and ten days later, October 3, the decline began. The first four days of October rank highest in admissions of patients with pneumonia following influenza. The onset of 20 scattered cases of measles occurred before September 25, and later the number slowly increased reaching its height about the middle of October; after this time a gradual decline began, and continued during about three weeks before the preepidemic level was reached. During this period of six weeks following September 25, 709 cases of measles occurred. TABLE LVIII ONSET OF MEASLES AND OF PNEUMONIA FOLLOWING MEASLES BY WEEKS FROM SEPTEMBER 11 TO DECEMBER 11, 1918