Train dispatchers. To limit hours of service of train dispatchers employed in interstate commerce, hearings before subcommittee, 75th Congress, 2d session, on S. 1492, to limit hours of service of train dispatchers employed by carriers engaged in interstate commerce to 6 hours in any 24-hour period, to establish 6-hour day for such train dispatchers, and for other purposes, Dec. 7 and 8, 1937.