, and the total pressure on the paper will be only
It is hoped that experimenters may turn their attention to finding definite values of the coefficient of cohesion for all kinds of earth. From observations of unsupported trenches, it has been seen that values of
of from 100 to possibly 400 lb. per sq. ft., may be expected. Résal states[Footnote 32] ] that MM. Jacquinot and Frontard, in July and August, 1910, made some preliminary experiments on earth taken from a reservoir dam which was failing, and found for it about
kg. per. sq. m., or say 409 lb. per sq. ft.; but
, corresponding to