, to a scale two or three times as large, and thus the thrust can be found as accurately as before.] [Return to text]
[Footnote 8:] Minutes of Proceedings, Inst. C. E., Vol. LXV. p. 140: reprinted in Van Nostrand’s Science Series.] [Return to text]
[Footnote 9:] In reference to this equation, see Appendix.] [Return to text]
[Footnote 10:] “The Bracing of Trenches and Tunnels, With Practical Formulas for Earth Pressures.” Transactions, Am. Soc. C. E., Vol. LX. p. 1. A number of important facts brought out in this paper are of vital importance to constructors.] [Return to text]
[Footnote 11:] “Mechanics of Materials,” Tenth Edition, p. 381.] [Return to text]
[Footnote 12:] Perhaps this may be accounted for by supposing cohesion between the blocks at rest, which is destroyed by the motion, when only friction acts.] [Return to text]
[Footnote 13:] Transactions, Am. Soc. C. E., Vol. LXX, p. 387.] [Return to text]
[Footnote 14:] Transactions, Am. Soc. C. E., Vol. LXX, pp. 365–368.] [Return to text]