Transactions of the American Society of Civil Engineers, vol. LXXII, J 71675 [Subtitle: Experiments on retaining walls and pressures on tunnels] [Full title: Transactions of the American Society of Civil Engineers, vol. LXXII, June, 1911] [Full author's name: William Cain] [Author: William Cain] [Link: https://www.gutenberg.org/7/1/6/7/71675] [File: 71675-h.htm] Thanks to Juliet Sutherland, David Wilson and the Online Distributed Proofreading Team at https://www.pgdp.net Regards, Al