Railroad safety--baggage cars : hearings before the Committee on Interstate and Foreign Commerce, Eightieth Congress, second session, on H.R. 4092, a bill to promote the safety and health of employees engaged in baggage, mail, or express train service in interstate commerce by requiring common carriers by railroad and any express company to install and maintain all such cars and equipement used or furnished by them for such purposes in safe and suitable conditions for use in the service for which thery are put. March 16, 17, and April 16, 1948.