Des Moines Evening TribuneJuly 29, 1915
SPEEDWAY RACES ARE CALLED OFF UNTIL AUGUST 7
The Speedway races have been postponed until Saturday, Aug. 7, on account of the heavy condition of the roads leading to the track and to Des Moines.
Announcement of the postponement was made this afternoon by G. Decker French of Davenport, representing the American Automobile association.