Switches and Crossings. Formulae for Ascertaining the Angles of Crossings, the Lengths of Switches, and the Distance of the Points of the Crossings, and the Heels of the Switches from the Spring of the Curve
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Switches and Crossings. Formulae for Ascertaining the Angles of Crossings, the Lengths of Switches, and the Distance of the Points of the Crossings, and the Heels of the Switches from the Spring of the Curve