,
, ..., to represent the forces of cohesion, acting upward along
,
, ..., where
the force of cohesion, in pounds per square foot. From the extremities of these lines, lines are drawn parallel to the direction of the earth thrust on
,
, ..., to represent the forces of cohesion, acting upward along
,
, ..., where
the force of cohesion, in pounds per square foot. From the extremities of these lines, lines are drawn parallel to the direction of the earth thrust on