was horizontal.
It was stated, in connection with [Equations (1)] and [(2)], referring to the thrust on a vertical wall of height,
, with the earth surface sloping at the angle of repose, that this particular case would be discussed later. To show the influence of cohesion, the planes of rupture for such a wall, 2.4 ft. high, for various values of
(in pounds per square foot), are given in [Fig. 13]. The values of
(for
and