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was held in Washington, D. C., on September 6, 1940, through September 13, 1940. Fred M. Glass, Attorney of the Board, presided as hearing examiner, and in addition to the Members of the Board, the following personnel of the Safety Bureau of the Board participated: Jerome Lederer, Director; R. D. Hoyt, Assistant Director; Frank E. Caldwell, Chief, Investigation Division; and Paul E. Gillespie, Chief, Investigation Section. At the hearing all of the evidence available to the Board at that time was presented. One hundred and thirty-four exhibits were introduced and eighty-five witnesses testified, including witnesses from the vicinity of the crash and experts in various technical subjects involved in the investigation.
While the Members of the Board, the Examiner, and the representatives of the Safety Bureau were the only ones designated to ask questions directly of any witnesses, the presiding examiner, acting under instruction of the Board, announced at the opening of the hearing that any person who had any evidence, questions, or suggestions to present for consideration in the proceeding might submit them to the Examiner. A number of such questions and suggestions were submitted, and at the close of the hearing the Examiner announced that every question submitted had been asked unless the subject matter of the question had previously been covered by the testimony. In the course of the investigation, many suggestions have been submitted to the Board orally or in writing, and all have been carefully considered.
Since the conclusion of the hearing, the Board and its staff have continued the investigation. Reports have been sought and received from the National Advisory Committee for Aeronautics, the Bureau of Standards, the Army Air Corps, and the Federal Bureau of Investigation
