the six talking marathon contestants after 12 hours at the Chicago Radio Show, Chicago, Illinois, October 21, 1930. They must talk for 55 minutes out of each hour and cannot use less than 75 words per minute

the six talking marathon contestants after 12 hours at the Chicago Radio Show, Chicago, Illinois, October 21, 1930. They must talk for 55 minutes out of each hour and cannot use less than 75 words per minute