Excerpt from A System of Automatic Train Control: A Thesis Presented by Charles Woodward Morgan to the President and Faculty of Armour Institute of Technology for the Degree of Mechanical Engineer Having Fulfilled the Required Conditions Preparatory to Making Such Presentation

The purpose of this thesis, is to present in as brief a manner as possible, consistent with clearness, the principles of a system of "automatic train control" and a general description of the apparatus used in connection with it.

The expression "automatic train control, " as herein used, is understood to mean, a block signal system in combination with appliances which work in accordance with the signals, and afford complete automatic protection against, - errors in the despatching system, errors of the enginemen, and failures of the signals to operate properly. Summarily, it guards against all errors human or inanimate and permits trains to move only when it is safe for them to do so.

The principles of the system only as redesigned for commercial use will be dealt with. These reconstructed plans are the result of about twenty years experiment and practical application by the inventor, Benton C. Rowell of this city.

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