Switch Layouts

Showing Graphically the Leads, Offsets and All Dimensions Needed for Locating Frogs of All Numbers and Curves in All Switches in Common Use. Curve Easements. Tables of Angles, Chords and Deflections for Easing the Transition from a Tangent to a Curve, and from a Curve of One Radius to a Curve of Another Radius

Augustus Torrey