1. The riot violence was not continuous, hour by hour, but was intermittent.
2. The greatest number of injuries occurred in the district west of Wentworth Avenue, inclusive of Wentworth, and south of the Chicago River to Fifty-fifth Street, or, broadly speaking, in the Stock Yards district. The next greatest number occurred in the so-called "Black Belt," Twenty-second to Thirty-ninth streets, inclusive, Wentworth to the lake, exclusive of Wentworth; Thirty-ninth to Fifty-fifth streets, inclusive, Clark Street to Michigan Avenue, exclusive of Michigan.
3. Organized raids occurred only after a period of sporadic clashes and spontaneous mob outbreaks.
4. Main thoroughfares witnessed 76 per cent of the injuries on the South Side. The streets which suffered most severely were State, Halsted, Thirty-first, Thirty-fifth, and Forty-seventh. Transfer corners were always centers of trouble.
5. Most of the rioting occurred after working hours. This was particularly true after the street-car strike started.
6. Gangs, particularly among the young whites, formed definite nuclei for crowd and mob leadership. "Athletic clubs" supplied the leaders of many gangs.
7. Whites usually employed fists and clubs in their attacks upon Negroes; Negroes used firearms and knives in their attacks.
8. Crowds and mobs engaged in rioting were usually composed of a small nucleus of leaders and an acquiescing mass of spectators. The leaders were young men, usually between sixteen and twenty-one. Dispersal was most effectively accomplished by sudden, unexpected gun fire.
9. Rumor kept the crowds in an excited, potential mob state. The press was responsible for wide dissemination of much of the inflammatory matter in spoken rumors, though editorials calculated to allay race hatred and help the forces of order were factors in the restoration of peace.
10. The police lacked sufficient forces for handling the riot; they were hampered by the Negroes' distrust of them; routing orders and records were not handled with proper care; certain officers were undoubtedly unsuited to police or riot duty.