Note Footnote 22 — DISCUSSION.
Reading edition
: “The Bracing of Tunnels and Trenches, with Practical Formulas for Earth Pressures,” Transactions, Am. Soc. C. E., Vol. LX, p. 1; and “Pressure, Resistance, and Stability of Earth,” Transactions, Am. Soc. C. E., Vol. LXX, p. 352.] Return to text