This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR"d book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. Это и многое другое вы найдете в книге Switches and Crossings: Formulae for Ascertaining the Angles of Crossings, the Lengths of Switches, and the Distances of the Points of the Crossings and ... the Switches from the Springing of (William Donaldson)