N.Y. air-break pumps ; : N.Y. triple valves and brake valves ; N.Y. air-brake troubles ; Train operation ; N.Y. foundation brake gear ; N.Y. air signal and high-speed brake ; B3 locomotive brake equipment ; L T automatic control equipment ; New York Type K freight triple valves ; New York type J passenger triple valves ; New York type GN freight triple valves ; control of trains | Collections | The Huntington