This is pretty cool. Its a book that is part of an Open Source Library orignally printed in 1903. You can read it on-line or download it - for FREE!!!

I can't wait to get home to download this onto my 'puter and give a quick cursery read. Should be interesting and insightful as far as how track was constructed and laid in during the early 1900's.

http://www.archive.org/stream/notesontra...0/mode/1up