by Charles M. (Charles Mattathias) Jacobs
Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910
The New York Tunnel Extension of the Pennsylvania Railroad, The North River Division. Paper No. 1151
en
~1 hours (69K characters)
Project Gutenberg
Produced by Juliet Sutherland, Sigal Alon and the Online Distributed Proofreading Team at http://www.pgdp.net