by H. Branch, O. Ryan, G. G. Mason, Jr., and G. P. Baker for the Civil Aeronautics Board

“ At the hearing all the evidence then available to the Board was presented, 72 exhibits were introduced, and 39 witnesses testified including witnesses from the vicinity of the accident and experts in various technical subjects involved in the investigation. Depositions of five passengers on board the airplane at the time of accident and the two surviving members of the crew were read into the record at the hearing. ”