The Pennsylvania Railroad (PARR) was one of the dominant railroad carriers in the US for over a century. For auction is a Rule Book entitled "Brake & Train Air Signal Instructions". The original was issued in 1944, but this is an update effective December 5, 1954. It covers such topics as standard air pressure, inspection and maintenance of brakes and equipment, operations, train speed control, making-up trains, tests, train handling, defects, signal operations, much more.
